Plenty of services from south east Essex, with a £16.90 day return taking from 90 minutes depending where you get on, from central Southend you could leave as late as half five and make the game, but I wouldn't trust the the British transport system that much!
Not long to wait going back, and the Old Bill sometimes keep a train waiting anyway, the 22.01 will get you back in Southend around half eleven.
After that there's a 22.07 and 22.31 with the last train at 23.31 but I'm sure your be all long gone by then!
Services leave and return to London Bridge on a regular basis, day return £4.30.
There are some services available from London Victoria at the same cost.
To confirm times go to www.eastcoast.co.uk.
South Bermondsey Railway Station is only a few minutes walk from the ground. There is a direct walkway specifically built for away fans which takes you directly to the away end and back to the station afterwards.
Remember, it's in a Group Save area that can cut the fares in half and travelcards will make it even cheaper. Find out more here: www.daysoutguide.co.uk/groupsave.aspx