Not many people know this but if a mortgage lender sees that you’re an active gambler it can go against your mortgage application. There is of course a difference between someone who makes the odd bet online and someone who is betting large sums of money daily.
The amount of active betting accounts in your name can also have an impact on your application; even if you’re not using them regularly. Mortgage lenders also do checks on recent bank statements and if they see regular gambling site payments that are taking you into your overdraft they could flag it with your mortgage adviser as an issue.
If your now worried about it and looking to get a mortgage in the next year or so then I would suggest stopping the betting for a while and set up a savings account to pay into every time you fancy a bet. You can’t lose that way and the mortgage company will see a regular saver in control of their finances. These are the people they like.