Routes 25, 26, 27 and 28: Cardiff Central, Bristol and Swindon to Southampton, Portsmouth and Weymouth (incl. Melksham!)Again, these routes can be split up into different core routes.
1) The premier route is the busy service between Cardiff and Portsmouth which runs via some busy towns and cities including Bristol, Bath, Salisbury and Southampton. There's a basic hourly service throughout the day, which doesn't increase in frequency for the peak hours, but certain other services running on sections of the route do provide for extra capacity (details below). Back in 1999, the same core service operated by Wales & West - the only change being that services now stop at Bradford-On-Avon, but journey times have slipped slightly in the last 10 years with the through trip now taking 3h 24m which is 7 minutes slower than most services in 1999.
2) There's also an hourly service on the Bristol Parkway to Westbury route - many of these trains start from Gloucester or Malvern, and run through to Weymouth a total of 8 times a day to give Weymouth (and several other stations, including Dorchester and Yeovil) a direct link to Bristol at least every three hours. When there isn't a through train to/from Weymouth, there is a train to/from either Southampton, Warminster, or Brighton which gives the central part of the route between Westbury and Bristol with an hourly off-peak service. These trains slot in with the Cardiff-Portsmouth services above to give 2tph at 30 minute intervals between Bristol and Westbury. A couple of extra trains feed the Bristol commuter market to provide a 15-20 minute frequency into Bristol in the morning and back in the evening.
Ten years ago there was a very similar service to/from Weymouth, with exotic sounding train names like the 'Weymouth Sand & Cycle Explorer', but they usually only ran as far as Bristol
TM‡, and the pattern of trains on the core central part of the route was much less ordered.
For comparison the number of trains from Trowbridge to Bristol TM per day is now 42. Back in 1999 it was 35. There are so many different stations to compare, so you'll have to forgive me for not getting to in depth with them, but I would say in general most stations have seen a slight increase in the number of services, and some have fared well such as Bradford-On-Avon, Freshford and Avoncliff.
Whilst the timetable is much more ordered and regular than it was 10 years ago, there are still a couple of interesting anomalies caused by the extension of some services north of Bristol towards Gloucester and Worcester and Malvern. For example, you can travel direct from Great Malvern to Weymouth three times a day at 12:51, 14:51 and 18:51, but there are
no direct trains in the other direction, with all the trains that reach Malvern starting at either Southampton or Warminster!
3) Finally, I'm sure Graham wouldn't forgive me if I didn't give some details of what has happened to the service through Melksham over the past ten years! Well, despite the service increasing to five trains a day each way in the intervening years (until 2006) the current service of two trains per day each way each weekday and one southbound service on a Sunday evening is actually more frequent than it was back in 1999! There was no Sunday service then, and only one train per day heading northwards during the week.
However, that doesn't tell the whole story! The timing of the trains is now much worse. Melksham to Swindon commuters need to leave at 07:17 and return at 18:44. With a just under 30-minute journey time, that is a long day for anyone and so not surprisingly the train isn't considered an attractive prospect. Back in 1999 the times were 08:05 and 18:36. Still not ideal, but much better! Now and then, the potential shoppers market on a Saturday from/to Swindon and Salisbury is completely ignored.
The Melksham service is one of the main reasons for the existence of this site, and I'm sure Graham won't mind me directing you towards the
http://www.savethetrain.org.uk/index.html sister website for those that haven't read up on the details of what happened in 2006 to the TransWilts service.