Phartpilot, I think case 1 is a no go but you would have to ask the UK CAA licensing.
Case 2 is a yes, I have a friend who is doing case 2 but he had to fill out a form and pay a fee to get the French DGAC to accept his UK exams, but he asked in advance. It looks like it is getting easier to get countries to accept other countries' theory exam results.