Rog, i want to raise a possible suggestion for the interior wood panel removal.
On the 1st image you show, it looks like the internal coffer is an add on.. un-bolt & remove.
I noticed that this is bowing the woodwork somewhat.
In addition, I noticed that at the top, between the wood lining & the safe, there appears to be a half plank of timber. If this is the case, then, by removing that one piece, it should release pressure on the innards. The top ‘should’ simply slide out by pulling, followed by easy removal of the sides, then its base.
Please correct me if Im wrong..
Regards
Russell Stoner
Withy Grove (Leeds) Ltd
t: 044 (0)113 2721441
www.wgsafesonline.com