Posted: Tue May 26, 2020 3:10pm
In addition to the other info. provided - As with the UK, you will need proof of income to be able to afford the mortgage repayments; and also prooof of where the deposit money has come from (savings, etc.) which is required to prevent money laundering.
If you have a mortgage in the UK, then they will need the information on that, so they can check you can afford another mortgage too.
They may also want a credit reference (Experian, etc. report) and you'll need an NIE number if you're not a resident. Any property you are interested in buying needs a habitation certificate (provided by the vendor).
Hope this helps...