I think W&N has repair sections for that area, they may be worth checking into. I do have an NOS pair of the complete bulkhead corners they are as I recall almost 2 feet tall so not sure if shipping to London is even feas-able (I am in Colorado USA.) And I have no idea what if any going rate would be for something like this, let alone how well the W&N knockoff repair pieces work for that obviously extensive repair.