Can I buy an Iphone 6 on t-mobile in the US that will work on UK LTE networks?

Hi, I'm heading to the US for a week soon and I was considering buying an Iphone 6 in the US for use in the UK. I would ideally like this to work on UK LTE\4G networks. This will be considerably cheaper (even after sale-tax and vat is added).

I will not have a US Social security number, so I will have to buy off-contract (SIM Free). I believe T-mobile is the only way of buying a SIM free Iphone in the US, however the information in the weblink below is confusing as it currently lists t-mobile as a supplier of both the Model A1549 (probably will not work) and the Model A1586 (probably will work) in the US.

http://www.apple.com/...phone/LTE/

Can someone who has bought the phone on T-mobile on the US off contact from Apple confirm the Model number Iphone 6 they received?

If it is the incorrect model does anyone know of any way I could get a Model A1586 off-contact in the US, ideally from the Apple store?

You want model A1586 because it covers the extra LTE bands (38,39,40,41) which the "US/Canada" model does not include. You can't purchase this model in the US *unless* you also sign for service with Sprint, (a CDMA carrier) and even then the GSM part of the phone is not unlocked by default. Also T-mobile is NOT listed "… As a supplier of both the Model A1549 and 1586," check again.