See what is on sale at wiggle or CRC and pray it fits. Evans is a better place to try on than halfords, they also price match the online boys.
Shouldn't we be replacing helmets older than ~4 years, even with no impacts, due to natural deterioration over time ?
,,, so it all sounds like BS to be honest
He's right you know.
Nip onto Planet X - I just bought one of their Power Race jobs (black with Italian flag) - wasn't expecting much tbh but very surprised - very light, fits very well, excellent chin strap ratchet mechanism, tightly wheel at the back works cool. One of my better off chance purchases.