Bathroom walls not right angled

[Della38]

I want to install a shower enclosure but the walls are not right angled so the shower tray doesn't go right into the corner leaving a big gap our plumber says it'll cost about 500 quid just to do the bonding which sounds outrageous to me is there anything else I could do?

I liked the idea of closing in just the gap in the corner

anyway any ideas will help thx in advance

 

[muggles]

Err...employ someone who charges less. £500 to square up a wall by a tray sounds like a lot to me, although it does of course depend on how big the tray is.