will not turn over

Ignition coil,you can have a new Batt and it can be a dud. or the starter silenoid can be bad,also check to see if u even have power to anthing,I've had customers put the batter cables on the wrong terminals.

If you have a meter or testlight and want to check the basics, start by checking the starter, you should have battery voltage at the battery cable at the starter. You should have battery voltage (12.4 volts) at the START wire on the starter when your assistant turns the key to START. If this is all good, I'd suspect the starter. If it's not good, you have to dig deeper and trace power throught the START circuit. Otherwise, you need to tow the car to an auto electrical shop or a Jag specialist. Here's a directory link for you: https://repairpal.com/jaguar-repair-in-dayton-ohio