Hi checked front regulator also after starting and it's dry but there seems to be a smell of gas from the line? What's strange also is that there is about 1/4 tank of fresh gas and any time it does not start if I add a couple of more litres it will start ? Is there a fuel breather near the tank or something that changes pressure once I add new fuel ? Or maybe there is a blockage of sediment that the new fuel shakes up each time to allow a better flow ? Thanks all

The smell of gas is what you are looking for. Let’s set this straight so that if needed you can order the correct part(s). The one at the front is a damper, as is the one at the rear on the drivers side. The one at the rear on the passenger side is your FPR. This link may be helpful to you, it has everything under the hood identified:

https://members.rennlist.com/v1uhoh/underthe.htm

Hook up a Might Vac to each one and see if they hold pressure. If one doesn’t hold pressure order a new one, Greg at Precision Motorsports. If they all hold pressure then rule them out, I suppose.

I would stop adding gasoline. At some point in this adventure you may need to drain all of it and you are just making that harder to do if you need to.

*driver's side* for US. I assume the engine compartment is oriented the same way and not swapped in the UK. Just to make sure. :-)