Q: Why is Talk Talk telling us that
BT is beating deals from Talk Talk?
A: Because the copy-writer has adopted the slovenly attitude to grammar that is currently the fashion. If this matter is raised the response is usually something along the lines of "grammar doesn't matter, people know what I mean"
Well, do they sunshine?
If I were to stereotype the copywriter I would expect him or her to speak Estuary English, dropping Hs and adopting the glottal stop.
A hyphen between BT and beating would reverse the current meaning and perhaps please the client more than the competitor.