Got car back today, report states that the idler pulley had seized.
New head gasket, 16 rockers, fixed tightener, trans belt, water pump, timing belt, belt stretcher and 3L of paraflu 11 - £432.26 inc VAT. They didn't put the labour rate on the report, but they did say they bill 8hrs for the job.
Checked the part number of the new water pump and it is the new type.
Can't grumble with the service, it would have been back with me within two days of it being recovered if the timing belt was ordered correctly.