andy001:
I don't think you would be able to get a mortgage at the moment, as lenders are being VERY risk adverse. You should go to see an Independent Mortgage Broker, who will run through your details and see if a lender is willing to agree to a mortgage in principle. If so, how much would the mortgage be and what would the term be. Some may only lend up to 15 years i.e. when you reach 65.
Also as Margot suggested, you should see a solicitor to obtain advice about what issues you need to consider. Would you be liable to pay any tax on any profit you earn on the property if it is sold in the future? Would you have to include any rent paid to you in your tax returns?
Your daughter would have to deal with all issues, council tax, maintenance charges for the flat, all other bills and collecting her flatmates share of these as well as rent. What if your daughters flatmate does not pay for awhile or she does not have a flatmate during some periods? Your daughter may then not be able to pay you the full monthly amount, so you would have to find the shortfall to meet your mortgage payments. These would be on top of all your other expenses for your own house. You could quite easliy get yourself into debt if you did not have savings to cover such periods.
I think you would be better looking at other options. Could you lend your daughter a smaller amount, so that she can buy a property under the governments homebuy shared equity scheme?
Huckster