Getting to Torquay by bus (coach) is really easy. You cant use National Express Coaches, who operate regular direct coaches to Torquay.
Coaches leave from the Victoria Coach Station in central London and Heathrow Central Bus Station - arriving at Torquay coach station.
See the timetable:
Depart Victoria / Depart Heathrow / Arrive in Torquay / Service No:
07.45 / 08.40 / 13.30 / 501
10.30 / 11.25 / 16.05 / 501
12.30 / 13.20 / 17.40 / 501
14.30 / 15.20 / 19.50 / 501
16.30 / 17.25 / 21.35 / 501
18.30 / 19.20 / 23.30 / 501
23.00 / 23.40 / 04.55 / 404