diff --git a/src/fixate/reporting/json.py b/src/fixate/reporting/json.py
new file mode 100644
index 00000000..87005c86
--- /dev/null
+++ b/src/fixate/reporting/json.py
@@ -0,0 +1,302 @@
+from datetime import datetime
+import logging
+import sys
+import os
+import time
+import json
+
+from pydantic.dataclasses import dataclass, Field
+from pydantic.json import pydantic_encoder
+from pubsub import pub
+
+from queue import Queue
+from fixate.core.common import TestClass
+from fixate.core.checks import CheckResult
+import fixate
+import fixate.config
+
+logger = logging.getLogger()
+
+"""
+Example of a log file:  
+Note that this is not currently exactly what the code outputs. It's more of a guide of what we want 
+to get to.
+
+{
+    "serial_number" : "1234567890", 
+    "start_time_millis": 1747868933064,
+    "end_time_millis": 1747868933064,
+    "outcome" : "FAIL",
+    "outcome_details" : [] 
+    "module_name" : "test_module",  
+    "part_number" : "123456",
+    "tests" : [
+            {
+                "test_name": "TestCrowbars",
+                "test_list" : "MainTestList",
+                "measurements" : [
+                        {   
+                            "name": "measure r41 resistance",
+                            "outcome": "PASS",
+                            "validators": [
+                                "9 <= x <= 11"
+                            ],
+                            "units": {
+                                "name": "ohm",
+                                "code": "OHM",
+                                "suffix": "\u2126"
+                            },
+                            "measured_value": 9.989233575589664
+                        },
+                        {   
+                            "name": "measure r43 resistance",
+                            "outcome": "FAIL",
+                            "validators": [
+                                "x < 119"
+                            ],
+                            "units": {
+                                "name": "ohm",
+                                "code": "OHM",
+                                "suffix": "\u2126"
+                            },
+                            "measured_value": 900
+                        },
+                        {   
+                            "name": "log the value of something",
+                            "outcome": "PASS",
+                            "validators": [ ],
+                            "units": {
+                                "name": "string",
+                                "code": "STRING",
+                                "suffix": ""
+                            },
+                            "measured_value": "On chk log, we might be able to dynamically populate the type information to put into the above fields"
+                        },
+                ],  
+              "parameters": {"testclassargs": ["things","stuff"]}
+              "start_time_millis": 1747868933064,
+              "end_time_millis": 1747868933064,
+            }
+    ],
+    "instruments" : [
+            {
+                "type" : "DMM", # We may need to add a type attribute to the drivers?
+                "name" : "FLUKE BLAH BLAH",  
+                "serial" : "1234",
+            },
+            {
+                "type" : "DSO", # We may need to add a type attribute to the drivers?
+                "name" : "Keysight BLAH BLAH",  
+                "serial" : "1234",
+            }
+    ]
+}
+
+"""
+
+
+class TestClassImp(TestClass):
+    """
+    Minimum implementation of the Test class so that it can be used for parameter extraction from the
+    actual implemented test classes
+    """
+
+    def test(self):
+        pass
+
+
+"""
+The log schema is defined by the following dataclasses
+"""
+
+
+@dataclass
+class InstrumentLog:
+    """
+    Log entry for the instruments
+    """
+
+    serial = ""
+
+
+@dataclass
+class TestLog:
+    """
+    Log of data for a test list
+    """
+
+    measurements: list[CheckResult] = Field(
+        default_factory=list
+    )  # Class to store all the checks that get done in the testList
+    parent_test_list: str = ""  # The parent test list that the test belongs to
+    test_name: str = ""  # The name of the test class
+    description: str = ""  # The test description
+    description_long: str = ""  # The test description
+    test_index: str = ""
+    outcome: str = ""
+    args: list[str] = Field(default_factory=list)  # args
+    start_time_millis: int = 0
+    end_time_millis: int = 0
+
+
+@dataclass
+class LogFile:
+    """
+    Logfile for a test run
+    """
+
+    tests: list[TestLog] = Field(default_factory=list)
+    instruments: list[InstrumentLog] = Field(default_factory=list)
+    serial_number: str = ""
+    outcome: str = ""
+    start_time_millis: int = 0
+    end_time_millis: int = 0
+    part_number: int = ""
+    module_name: int = ""
+
+
+class JSONWriter:
+    def __init__(self):
+        self.log_queue = Queue()
+        self.json_writer = None
+
+        self.log_file_path = fixate.config.LOG_DIRECTORY
+
+        self.log_path = ""
+        self.exception = None
+
+        self._topics = [
+            (self.test_start, "Test_Start"),
+            (self.test_comparison, "Check"),
+            (self.test_exception, "Test_Exception"),
+            (self.test_complete, "Test_Complete"),  # Finish up the log file here
+            (self.sequence_update, "Sequence_Update"),
+            (self.sequence_complete, "Sequence_Complete"),
+            (self.user_wait_start, "UI_block_start"),
+            (self.user_wait_end, "UI_block_end"),
+            (self.driver_open, "driver_open"),  # Log the instruments here
+        ]
+
+        self.logFile = LogFile()
+
+    def install(self):
+
+        for callback, topic in self._topics:
+            pub.subscribe(callback, topic)
+
+    def uninstall(self):
+        for callback, topic in self._topics:
+            pub.unsubscribe(callback, topic)
+
+    def ensure_alive(self):
+        pass
+
+    def sequence_update(self, status):
+        logger.info("Sequence update")
+        if status in ["Running"]:
+            self.logFile.start_time_millis = time.perf_counter()
+            # Get the module name and test name etc
+            test_module = sys.modules["module.loaded_tests"]
+            module_name = os.path.basename(test_module.__file__).split(".")[0]
+            self.logFile.module_name = module_name
+            logger.info(f"module = {module_name}")
+
+            # Get the serial number
+            serial = fixate.config.RESOURCES["SEQUENCER"].context_data["serial_number"]
+            logger.info(f"serial = {serial}")
+            self.logFile.serial_number = serial
+
+            # The part number is not necessarily in the context data yet...
+
+    def sequence_complete(
+        self, status, passed, failed, error, skipped, sequence_status
+    ):
+
+        self.logFile.end_time_millis = time.perf_counter()
+        self.logFile.outcome = status
+        logger.info(f"stoptime = {self.logFile.end_time_millis}")
+        self.save_file()
+
+    def test_start(self, data, test_index):
+        """
+        :param data:
+         the test class that is being started
+        :param test_index:
+         the test index in the sequencer
+        """
+        logger.info("Test Start")
+        logger.info(data)
+        logger.info(test_index)
+
+        new_test_log = TestLog()
+        new_test_log.description = data.test_desc
+        new_test_log.description_long = data.test_desc_long
+        new_test_log.start_time_millis = time.perf_counter()
+        new_test_log.test_name = data.__class__.__name__
+        new_test_log.test_index = test_index
+        new_test_log.args = self.extract_test_parameters(data)
+        self.logFile.tests.append(new_test_log)
+
+    def test_exception(self, exception, test_index):
+        logger.info("test exception")
+        logger.info(exception)
+        logger.info(test_index)
+
+    def test_comparison(
+        self, passes: bool, chk: CheckResult, chk_cnt: int, context: str
+    ):
+        logger.info("Test comparison")
+        logger.info(f"passes {passes}")
+        logger.info(f"results {chk}")
+        logger.info(f"count {chk_cnt}")
+        logger.info(f"context {context}")
+
+        self.logFile.tests[-1].measurements.append(chk)
+
+    def test_complete(self, data, test_index, status):
+        logger.info("Test complete")
+        logger.info(data)
+        logger.info(test_index)
+        logger.info(status)
+
+        self.logFile.tests[-1].outcome = status
+        self.logFile.tests[-1].end_time_millis = time.perf_counter()
+
+    def user_wait_start(self, *args, **kwargs):
+        pass
+
+    def user_wait_end(self, *args, **kwargs):
+        pass
+
+    def driver_open(self, instr_type, identity):
+        logger.info("Driver Open")
+        logger.info(instr_type)
+        logger.info(identity)
+
+    @staticmethod
+    def extract_test_parameters(test_cls):
+        """
+        :param test_cls:
+         The class to extract parameters from
+        :return:
+         the keys and values in the form in alphabetical order on the parameter names and zipped as
+         [(param_name, param_value)]
+        """
+        comp = TestClassImp()
+        keys = sorted(set(test_cls.__dict__) - set(comp.__dict__))
+        return [(key, test_cls.__dict__[key]) for key in keys]
+
+    def save_file(self):
+        """
+        Dumps the logfile to a .json file
+        """
+        now = datetime.now()
+        json_data = json.dumps(self.logFile, indent=4, default=pydantic_encoder)
+        with open(
+            os.path.join(
+                self.log_file_path,
+                "test_log_" + now.strftime("%Y%m%d_%H%M%S") + ".json",
+            ),
+            "w",
+        ) as f:
+            f.write(json_data)
diff --git a/src/fixate/sequencer.py b/src/fixate/sequencer.py
index 69d3db52..f258ff28 100644
--- a/src/fixate/sequencer.py
+++ b/src/fixate/sequencer.py
@@ -6,7 +6,7 @@
 from fixate.core.exceptions import SequenceAbort, CheckFail
 from fixate.core.ui import user_retry_abort_fail
 from fixate.core.checks import CheckResult
-from fixate.reporting import CSVWriter
+from fixate.reporting import JSONWriter
 
 STATUS_STATES = ["Idle", "Running", "Paused", "Finished", "Restart", "Aborted"]
 
@@ -110,7 +110,7 @@ def __init__(self):
         self.context = ContextStack()
         self.context_data = {}
         self.end_status = "N/A"
-        self.reporting_service = CSVWriter()
+        self.reporting_service = JSONWriter()
 
         # Sequencer behaviour. Don't ask the user when things to wrong, just marks tests as failed.
         # This does not change the behaviour of tests that call out to the user. They will still block as required.