I use UkPOSTBOX. 21 quid a month, its a "real" address so banks accept it, they scan post so you can see it online. They store physical post for like 10 pence a month (eg cards) and you can itbposted at standard PO rates where you like so can be in UK when visiting eg at a hotel l or send to address abroad.
Only ever had one issue and that was the Halifax (aka as a bunch of cun#$ who closed all my accounts after demanding I prove I really lived there)
A bigger issue though is DONT invest house money in Thailand. You are better off renting your house or investing in UK, then using the rent/dividends/interest to rent in Thailand.
Also you will be subject to capital gains tax on your house sale for the tears in Thailand. Ouch.