A jet P-51 Mustang?

No, these were just experiments. The first was to test pulse jets - they look like captured German items - the second was a primitive jet test and wasn't realistic as an operational aeroplane, and the third was a rocket accelerator, something attempted more than once by Germany, America, and Russia. The Russians put one dual power fighter into limited action, but the Americans were never seriously convinced by such things, and I can't think off-hand of any British attempts, but then the British made better progress with pure turbine power.