From the website above:

"We're an established, experienced company
Onetel is owned by Centrica plc, which also owns British Gas. We have been operating for more than ten years now, and we're known and trusted by over 1.7 million customers in the UK."

I thought that they were up for sale/disposal?

Sorry, BJ, I was making an oblique point about their not giving the full picture. 
But I suppose that "come to us we're up for sale" might not be so inviting.

New customers only. So existing customers get a raw deal. Any existing customers should withdraw their business. I have complained to Onetel about this. Will let you know what they say.

Is it possible to sign up with Onetel on a referral for the £20 credit each but not have select but have the 1877 access code instead?

I was treated really bad by one-tel about 8 months ago and I was not even a customer at that point.
I had sent them a basic email with some questions and enquires about the serivce, heard nothing for some time.

Next I had a plug-in pre-dial box sent to me and a letter saying welcome to One-Tel, after calling them and waiting in a que for what seemed a lifetime I got through to an overseas call centre the line was awful I was passed from piller to post after they insisted I was a customer, even though I proved I was not. Cowboys avoid them, I am BG customer and I had one of their C.S muppets call me up this week trying to sale me every B.G product under the sun and when he mentioned one-tel and I just laughed and said "sorry you destroyed any hope of selling me anything now".

onetel once was decent.. the aussie and kiwi call centers were outstanding.. Then slowly, in came the cheap folk and things went down hill.. They dont even know what caller ID is, and I have 12 plug in boxes, what the hell?!?! I soon told them where to stick it.. Shame, I miss the origional onetel..

They dont train their staff, its a no wonder the company is so s**t now.

I emailed Onetel to complain about the 99p deal only being for new customers. I received an email saying I my email has been passed onto another dept and I would recieve a reply within 48 hours. 3 days later I phoned them up, got through to an indian call centre. Spoke to a woman gave details, had winge, she passed me through to somebody else. They said that the only way to get the rate would be to cancel and come back as a new customer. I said, "You do realise that I may not come back and during the time I am away you will lose revenue, so surely the best thing for both of us is to move me to the new rate without any more hassle" I was promised a call back from a manager that day....which never came.

So I just phoned them again tonight. I again got through to an indian call centre, who seem unable to communicate wihout reading off a list of things to say, even if I complain about not having a call returned. Onetels customer 'service' has obviously been completely outsourced to India. So this is why customer service levels have suffered - No returned calls or emails. I asked politely (all the time BTW) if I could have a manager call me back and threatened that if this time I do not get a call back tonight, the next time I will be calling I really will cancel all my Onetel services. So no call back - surprise.These guys I speak to have no clue and can only repeat that its available to new customers only, like parrots.

Bunch of incompetants in my experience. Shame because they used to be a good company to deal with. No wonder Centrica have put them up for sale.

Does anybody know any contact telephone numbers for Onetel management in the UK before I give up and cancel it all?