The correct, high-quality, UK or EU-manufactured flat-backed belt with 5 multi-V grooves on the inside to fit late-model Coronet and Record "Major" wood turning lathes and the multi-function machines based on this machine.
The earlier Major used an ordinary V-drive belt and this can be ordered here: https://store.lathes.co.uk/parts/coronet-major-lathe-v-belt
The Coronet "Major" is the model with a single round steel bar as its bed - details of Coronet Major wood-turning lathes can be found here
For the later twin-bar bed Coronet/Record No. 1, 2 and 3 lathes, the correct belt can be found here: https://store.lathes.co.uk/parts/drive-belt-coronet-record-no-1-no-2-and-no-3-wood-lathes