I can't see this mentioned elsewhere... NRE say
In fact the service is unusable and can only do further damage to Rail UK's reputation (and our carbon footprint.}
In fact they have withdrawn all their trains, just the 2 XC trains calling at Whittlesea, leaving travellers with the options of either a 2-hour coach journey to Bury St Edmunds or getting into Peterborough by road then paying more - for the non-stop coach to Bury St Edmunds.Recent signalling problems have resulted in a shortage of trains. As a result, a reduced train service is running between Ipswich and Peterborough.
Buses will run in place of cancelled trains. This includes a direct bus service between Bury St Edmunds and Peterborough, in both directions, to speed up the journey and help people meet connections for onward journeys. Other buses will call at intermediate stations. The bus timetable can be found here.
Disruption will continue until further notice.
In fact the service is unusable and can only do further damage to Rail UK's reputation (and our carbon footprint.}