Hi Dave and welcome to the forum
Your Mum has enough equity in her property to repay her debts in full, so I would suggest that she remortgages now and gets them paid off.
A new mortgage will cost much less than the debts she owes, where she is probably only covering accruing interest charges each month without reducing the capital balances at all.
I appreciate that this leaves them with a much larger mortgage, but with £300 to £400 spare money available each month this should easily cover the increased payments.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk