You will need to show 3.5 hours assymetric training in amongst your 6hours dual.
You must go to an approved FTO as they will be the only people to have a written exam., once you have passed that you can take the flight test which you will also have to re-take annually.
Flying Club Connington have a BE76, stick to that or you'll need additional training on the Seneca. Both Conington and Sibson have a Seneca.
You will need 70 hrs total (S/E and M/E) PIC to apply for the rating