I noticed a hairline crack last year on the roof towards the rear (not the pop top) and forgot all about it until today when cleaning her ready for a week away. It’s not a spider crack just a 30cm ish long crack. No other cracks are visible. Should I be concerned or just leave it be? Thanks.

If you decide to leave it and put up with the aesthetics, I would worry about damp and maybe consider applying Captain Tolley’s Creeping Crack Cure. It will be drawn into the crack (capillary action) and form a semi-plastic seal. I have used it on boats and my van with success.

I agree with that suggestion - Captain Tolley's is cracking stuff...

No, it really is!

Excellent 👍 thank you.

I noticed a spider crack towards the rear near side corner, about 30mm overall. Any recommendations for best approach? I’ve got captain trolley on standby!