Thanks for your help.
I will check what you have suggested but i don't fancy tackling the carbs so might send her in for that if it comes to it.
I will put a link for youtube on her running, on the video that i show the rev counter the loud click/pop you hear is from the exhaust , its a sports exhaust on her ( previous owner ) it has always made pops and noises when you come off the throttle but now its when your using throttle , the second vid gives a better idea as you can hear it when I'm revving the engine.
https://youtu.be/wr0N_e7l8t8
https://youtu.be/3P8QYqPIzAA
I have no idea if one cylinder is cutting out , both downpipes do get extremely hot when only running her for 5 mins or so.
I know in the end i will probably have to put her in to the garage but i thought if i can rule out simple things and keep a list ,at least i will possibly save a few hours labour