Hi Philip! OFW's used to prefer Landbank for remittance purposes because they have no maintaining balance like other banks. Deposit needed is only 100-200 pesos if you're in the Philippines.
It was my bank when I was still OFW.I don't think you can deposit or make an opening account from UK.
But then try to make a query or get in touch with their foreign subsidiaries.
https://www.landbank.com/subLBP_remit.asp