Agree with Gin's information, with the advice that if you don't feel up to the distance learning (does not suit everyone, and if you struggle can end up taking longer and being more expensive) the full-time groundschool is around 26-28 weeks, depending on the exact timing of the CAA exam sittings.
CPL/IR can be shortened with the co-operation of your FTO to around 8-10 weeks, weather permitting, as long as you don't mind working hard at it - you fly twice a day where possible and work hard on the ground for the between-flight consolidation and planning.