As 365 days has said, I think it differs per hospital.
However saying that, I had my results from my smear within a week and it obviously explained what I had (high grade dyskaryosis). I had biopsies taken on 21 August (consultant said potential CIN2/CIN3) and I chased for my results at 3 and 4 weeks and the secretary had been on annual leave for a duration with nothing picked up in her absence. When I eventually got hold of her, she said shes catching up but will send out a letter ASAP. It arrived a few days later but had no content at all, just 'Further to your visit to the colposcopy clinic, the biopsies that were taken have shown some cell changes which require treatment" and that they had booked me an appointment for LLETZ. Fair to say I was scared as I wondered why they didnt mention what my actual results were in the letter, so I had to phone the next morning and find out. She told me over the phone its CIN3 but didn't sound very positive, so I am dreading it!
I have my LLETZ tomorrow, no doubt it'll be another 4-6 weeks for results from that, but I will certainly be asking more questions as to why they didnt specify my results in my letter (or if thats normal procedure I dont know?).
I assume they will put something in writing about what has been removed otherwise how else would you find out unless you ring them? I'm not speaking from experience though so I think the best bet is to keep chasing, and once you have something in writing hopefully it states whats removed/results, and if not, you can ring! I hope you're results come back OK :-)
Also to add to this, I think they may mention terms such as 'clear margins' or 'unclear margins' meaning if there are any cells remaining at the edges of the cells they have taken (i.e. if there are any potentially left) but thats the only terminology I know!! Sorry :-)