You'll just have to wait and see what vauxhall come back with, then look into your options. Hopefully they'll give you a decent contribution towards the engine replacement. Have they started any work on it and would it cost you anything to take it away and possibly fit a used engine? Certainly a difficult situation to be within.Something like this or is this site dodgy? Two vastly different prices for what appears to be the same engine...
EnginesOD - 1.4 Turbo Astra Engine (2015-on) K Vauxhall B14XFT 150 BHP Petrol Engine - enginesod.com1.4 astra turbo engine, b14xft enginewww.enginesod.com
EnginesOD - 1.4 Turbo Astra Engine (2015-on) K Vauxhall LE2/B14XFT 150 BHP Petrol Engine - enginesod.com1.4 astra turbo engine, b14xft enginewww.enginesod.com
Got through to my case manager and he's going to try getting my service history details from Motordepot himself and said he can't promise anything but he'll see what he can do. I think I'd be lucky to even get a 50% contribution now which would mean it would still probably be cheaper sourcing an engine myself and going to an independent garage.
Hope all goes well for you.