
1.9 1984 Petrol T25 just done a 700 mile round trip to Cornwall and back without any issues and now after a day on the drive back home it wont start

Was low on fuel and parked on a hill thought maybe no fuel running through but topped up with 5L and still wont start.
Battery seems fine wipers/stereo/internal lights working and ignition noise/turning over when turn key but engine not firing up. Had a full service and inspection at Jacks Garage beforehand and was all tweaked and ready for the road so no idea what the problem is
Worried as thought water was topped up and just looked and is below the min line so might have done a fair bit of the return journey Cornwall-London without water tank topped but there was no cooking/overheating/smell on journey back
Thoughts and comments most welcome
