mobile

I am looking at getting a HTC One M8 but need to steer clear from the LTE 4G version as LTE doesn't support 800mhz on the 4G band and my network provider (O2) only supports 800mhz for LTE. eBay seem the best place to get a new M8 at a decent price but alot of them don't list weather its the LTE version or not or just down right don't know. Is there a way to tell from the box which version the phone is?, would all M8's bought from UK stores be the non LTE version?