I refer you back to reply #8. You keep going about this all wrong. If you admit liability, they are never, ever, EVER going to settle for the £60 you have offered them!
You have been told, time and again, debt collectors are POWERLESS to actually do anything. They certainly can't instruct solicitors to sue you. You are clearly low-hanging fruit on the gullible tree and stand to be ripped off because you are not heeding any advice.
Only a firm of solicitors or Bridge themselves can send you an LoC. Even then, there is no guarantee they will actually issue a claim. If they do, then it is easily dealt with. They will most likely use the incompetents at QDR Solicitors to issue an LoC but it is likely that QDR will simply act as a debt collector before issuing the LoC.
Until you receive an LoC, we don't need to know anything about the debt collector rubbish.