I got a comment this morning on my list of UK NT PhD programs from Thorsten Moritz. Though he teaches at Bethel (in St. Paul, MN), he apparently has strong links back in the UK, so they let him supervise students on behalf on London School of Theology from the US with library privileges from Bethel. Since it is a UK program it is still targeted at 3 years, but with more of a US price tag ($12k/yr). It seems that the only required trip to the UK would be for your viva (i.e., the defence of your thesis). It is definitely an interesting option.