Just to complete topic...
Just got my 4/4 back from first free service at Phil Ledgerwood and among other things I had a sports/straight through silencer fitted which Phil has specially made by Powerflow:
Happy now...it has a deep burble on tickover and a nice bark on the move with a fantastic crackle and pop on the over-run...perfect gives the car more "road presence" and better gases flow...need K+N now .Can nearly play a tune with new sound !!!
Seasons greeting to all