A block on the accounts or a self exclusion on ALL accounts? Which if you have 150 will probably be just about every one in the UK.
You know theres a difference, if you don't SE then I guarantee you will play this money back if you get it refunded. That is what addiction does. Losing your house won't matter in that moment as all you will see if the chance to gamble. You MUST self exclude from everywhere.
Look at it this way, when you deposited this £25k, you didn't care about losing your house, if you did you wouldn't have spent it. So if you get it back again, you won't care, you will spend it again unless you stop yourself from doing it again. The ONLY way to do that is self exclude, not close or block accounts. And self exclude for a min of 5 years. You won't be better in 6 months or a year, possibly not in 5 years.
Sorry if that sounds harsh, but people with addictions need harsh at times when they stand to lose everything. Just trying to help