During the Summer of 1999 Class 60's became prime power for the Stoke - St Blazey China Clay services, this caused some operating difficulties in Cornwall where there was still a requirement for Class 37's on St Blazey trip workings, it became fairly common for 6V70 to be formed of 2 x dit Class 37's and the China Clay Wagons, on 30/7/99 60076 passes Chelvey as it leaves Bristol with 37174 and 37253 in the consist. ©John Chalcraft/www.railphotoprints.co.uk