I ordered a saw blade and delta sanding sheets from https://www.saxtonblades.co.uk/ at 11.27am yesterday. Had an email at 1.07pm that they'd been despatched. 11.35am this morning I got them.
Brilliant!
Just had similar 24 hr service from Direct Plastics for three sheets of Tufnol. Plus they called me to check a detail in my order; delivery was by DPD who gave an hour slot for delivery this morning, plus the name and a pic of the driver, plus an online map telling me where I was in the delivery queue, and got it delivered right in the slot.
I certainly recommend them strongly for almost any plastic, with reasonable prices for small quantities.