Agge
Right mate, I just looked on here,
www.nationalrail.co.uk and found this, Heathrow Bus Terminal 5 to Woking ( Going by Bus ) Departs 21.05 Arrives 21.15, Depart Woking ( by train ) 21.21 Arrive at London Waterloo 21.49, now I know this is very tight but this is what it says Depart Waterloo at 21.49 and Arrive at West Ham at 22.37, then Depart West Ham at 22.49 Arrive at Basildon 23.17..........Thia is the only way where you don't have to walk as any other way by train you have a 7 minute walk from Tower Hill to Fenchurch Street, So there you have it mate but just check the webb site above.
Hope that Helps
Twizz, London East Coast Irritant