I believe everything is correct as it used to start and run prior to the last month or so

Fuel pressure I believe is ok but I havent measured it as such, I just know it pis5es out at high pressure if I remove the fuel pipe from the bottom of the regulator

Spark plugs are brand new and still look as new...also, once I get it to start via brake cleaner...it runs perfect...

Could it possibly be a dodgy fuel injector or something? But even then surely it should fire as it runs fine once given an initial shove by brake cleaner