Little update. Went over to my best mates house and he has all the tools on the planet ....except the one that lets you take the crank arms off doh! removed the covers and used Aluminium anti-slip (not copper
) on every one of the bolts and t20 screws. We found a small bit of play in the left pedal that was allowing about 3mm of space between the pedal and the little rubber boot so we removed the pedal and cleaned it up and applied some anti slip and reassembled it correctly again (note there was a small score due to dirt ingress). Removed, cleaned,applied anti slip and relocated the seat post. ..
Hey presto !! quieter than a church mouse.
Been out in the rain (yes it was tipping down last night where i live) and back and forth to work for two days and still nice and slick sounding!!
Thank you everyone for the advice this problem was really ripping my tights and now i know what to do if it rears its head again!