Thanks for the info James.

When it's rained heavily and the car hasn't been used for >24hrs then it struggles to start. I always wait for the fuel pump to prime before starting it anyway. When I turn the key it turns over fine but it just doesn't spark. If it does, even if I pressed the accelerator it can cut out pretty quick or will stall.
Tbh, it does exactly what you described with the compression thing, pulling off from junctions is difficult because it just feels bogged down. Few miles up the road and it's fine.

Can't remember which spark plugs I bought. Think they were ngk, and my mate fitted them. He does know what he's doing though!!

Yeah, gonna replace the MAF, because now and again it'll hesitate under hard acceleration or pulling off from low revs.

It did have a diagnostic done a little while ago for the hesitating and it didnt show any faults, but was told the MAF was reading 4. They said they wouldn't usually suggest changing it until it was about 7/8.

I'm not massively bothered yet (though that compression thing is worrying), it's runs great and never gives me any major problems *touch wood*!!

What's a drop test? Might get a new battery anyway.