It is confirmed that 37159 has returned from Volvo without modification to its maximum speed. Despite the best efforts of Volvo engineers, the necessary work was not possible and a 50mph max remains. I had thought that this work had already been carried out and it may explain why K3 with 37159 was 23 late going to Lowestoft this morning, 37564 following on K4 was on time and 37160 on K5 was then 17 late. Services settled a bit after this, but L11 with 37574 was 18 late through Walpole (due 13.06).
The Dennis Trident under repair at King's Lynn is destined to return to Norwich on completion and the plan at the moment is to then send either 37156 or 37157 to Lowestoft for X1 use. There is still no further news on 20500/1, but the three Profiles are now at work in Essex on the Clacton to Stansted link.