
Daily except 25th and 26th December and 1st January, a National Express Coach runs from Trowbridge, Melksham and Sells Green to Heathrow and London (Victoria), though looking at the timetable published online by
National Express, you would think it ran non-stop from Frome to Devizes - see
[here].
Here are the daily timings, current at 1st November 2011 (and they have scarcely changed for many a year ... )
Morning - Eastbound to London
07:05 Frome
07:30
Trowbridge
07:45
Melksham
07:55
Sells Green
08:05 Devizes
08:20 Beckhampton
08:40 Marlborough
08:50 Froxfield
08:55 Hungerford
09:15 Newbury
10:15
Heathrow, Central Bus Station
11:00 London (Earl's court)
11:15
London (Victoria Coach Station)
Evening - Westbound from London
07:05 Frome
18:00
London (Victoria Coach Station)
18:45
Heathrow, Central Bus Station
19:45 Newbury
20:05 Hungerford
20:10 Froxfield
20:20 Marlborough
20:40 Beckhampton
20:50 Devizes
21:00
Sells Green
21:05
Melksham
21:15
Trowbridge
21:40 Frome
For fares, connections, etc - seee the
National Express Coaches site - at least in knows about Melksham and Trowbridge if type in the place names.

Also - breaking news - National Express have just introduced a 33% off discount card for more mature and / or disabled people - see
[here] which replaced the 50% off scheme that was government funded and ended last night (31st October 2011). With the new scheme, you do need to buy an annual card for an extra £10.00, but if you're a senior making several journeys a year it is probably worthwhile.
(written 2011-11-01, updated 2011-11-02)
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