Friend has 1.1 petrol Saxo Xreg.
Left out in the sun all day it wont start.
On a cool day no probs.
Any ideas guys?
Steve.

park it in a garage

fuel evaporating?

Sounds like fuel vapour lock, all right. Don't know what kind of fuel system it has, but most fuel-injected vehicles have a Schrader-valve type pressure relief valve on the fuel rail. Push the button in the centre, vapour lock bleeds off, you're back in business...

common for fuel pipes to chaffe on the rear axle drivers side plastic pipe runs vry close to xle and up over fuel tank worth checking

it likes sunbathing