Hi Tim,
Thanks for getting back to me.
It was a fundamental rebuild from the ground up, so pretty much a brand new site on the domain.
I can't see that the algorithm on the 27th October will have impacted performance to be honest, it actually looks like the site has been struggling organically for some time (from even before the time we acquired the site) but when the site redesign went live it dropped dramatically!
Looking forward to hearing your advice - it's appreciated!!!
Thanks.