HI, just moved into a new house and it has a great workshop in the garden. Previous owner said it is supplied from the house approx. 60mtr by 4mmm and 2.5mm swa BUT 4 small lighting circuits(2 inside ligting/2 outside) are on 1 20 amp mcb back in the house and if ever it trips all the lights in the workshop can go out. Question.Can a breaker ie an MCB be fitted on each of the 4 circuits to stop this happening ie on the each light cable. Is this an 'inline rroduct@ or is it simply getting an electrician to fita small consumer unit with 4 mcb's-dont know if an RCBO is needed as the consumer unit back in the house has one?