Re: Where are Offcom?
You could go to Plusnet. Yes, I know that they have had a slating recently for crap customer service but...
I've been with them for internet only since 2005 ( perhaps earlier), and have just moved my phone service as well. Business use, was paying 250 per quarter for two lines & internet. Went down to one line, now paying 76 per quarter all in, with unlimited calls (UK & Mobile).
Worth considering ,YMMV.