You could stay with Orange. That would be a BT Wholesale "White label" service now as far as the internet provision went, but if Orange have a Home Move system it could be your cheapest option.
Do you mean VOIP by "broadband phone", or just missed an "and" and meant "Anytime Phone and Broadband" bundle? I don't know how VOIP is handled under the new arrangement.
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost.
Internet connection - IDNet Home Starter Fibre.
Live BQM.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.