Greater Anglia: Faster London-East Anglia trains to run
Commuting times to London will be cut to less than an hour from Ipswich and to 90 minutes from Norwich on four new train services.
The extra Greater Anglia trains will not stop at stations such as Diss, Stowmarket and Chelmsford.
Most existing runs between London Liverpool Street and Ipswich take about an hour and a quarter, and just under two hours between London and Norwich.
The new services will cut 12 minutes off the fastest Norwich-London run.
The fastest journey between Ipswich and London will reduced by four minutes, said train operator Greater Anglia.
The 90-minute services will depart Norwich at 09:00 and 17:00 (calling at Ipswich at 09:33 and 17:33) and, in the other direction, from London Liverpool Street at 11:00 and 19:00 (calling at Ipswich at 11:55 and 19:57) and will operate on Mondays to Saturdays.
Jamie Burles, Greater Anglia managing director, said: "Faster journey times and thousands of extra seats will provide a boost to people who live and work in East Anglia, as well as supporting the regional economy."
Extra summer services will run on the Norwich-Ipswich-Colchester-London Liverpool Street, the Norwich-Lowestoft, Ipswich-Peterborough, Ipswich-Felixstowe, and Norwich-Great Yarmouth routes, when the new timetable comes into effect on 19 May.