I believe 3 to be Bath Spa....
It is indeed Bath Spa

As the 24 hours is up

17. Bristol Temple Meads
20. Taunton
Both correct

4. Gatwick Airport. I'm not 100% sure but that's taken from First Class on a 442, and that's a 319 in the picture and the 'i' station sign appears to be in Gatwick Express colours.
Number 4 is indeed Gatwick Airport... Taken from inside a Gatwick Express Service for London Victoria... A Class 442 in First Class as you again pointed out

So bonus points for detail

As per the PMs I received (Only 2

)
bignosemac - Correctly guessed 19 out of 20

1. Reading - Yes
2. Newhaven Town - Yes
3. Bath Spa - Yes
4. Three Bridges
- No5. Tottenham Hale - Yes
6. Brighton - Yes
7. Weymouth - Yes
8. Yeovil Junction - Yes
9. Southampton Central - Yes
10. Bristol Parkway - Yes
11. Westbury - Yes
12. Bournemouth - Yes
13. Bath Spa (again!) - Yes
14. Castle Cary - Yes
15. Watford Junction - Yes
16. Trowbridge - Yes
17. Bristol Temple Meads - Yes
18. Gillingham (Dorset) - Yes
19. Sheffield - Yes
20. Taunton - Yes
19/20

Not Bad

Only number 4 has completely stumped me. Looks like you're in a Gatwick Express branded service.
It is indeed taken from inside a Class 442... It's not Three Bridges however

Chris from Nailsea Correctly guessed Number 3 as Bath Spa:
My attempt to get an answer in was so eager I didn't see John R's reply in my rush. Ah well! Thanks for the fun.

Happens to us all at some point
