thanks for the help everybody - we are now getting a builder to look at the job and quote so we can move on
i must say the structural survey seemed a bit of a waste of time on this point as i already knew it was bulging and could have just got an engineer or builder in straight away
but...
well i can attempt to get some photos
it is a cavity wall construction
http://www.zoopla.co.uk/property-history/15-duckworth-road/prestwich/manchester/m25-9gf/28491018
this is a link to images on the internet i don't know if they would help
and the engineers has said the following...
I am trying to purchase a 1930's semi and have had a structural surveyor look at the porperty. he has reported that the gable end is bulging approximately 7cm and owuld recommend rebuild.
Is 7cm too signifcant to simply be a replacement of wall ties/lateral restraints job? or could that work...