For a very basic implant job, expect to pay between �1000 - �1500 upwards.
I'd like implants, and my dentist says my jawbone and gums would take them well. However, she says it would be virtually impossible to get NHS funding for them as they're not deemed medically necessary (I have crowns and awkward gaps towards the back of my mouth, and would love a set of teeth of uniform shade, without dentures). For the NHS funding people to approve them, it would take a lot of red tape and form filling beforehand, too.
There was a young guy on the news a while back, who'd been attached in the street and had all his front teeth knocked out. He got his implants, but it took months to get the funding approved even in his case.