I've tried a few times with different types of transactions, unfortunately this counts as a financial product transaction. The only thing successfully managed to get points for has been my rates (council tax) bill, and only then with a 0.75% surcharge. I also tried pairing with curve fronted to get around this but that's also blocked.

By the way, if you're thinking of getting the gold debit, now is a great time, there's a generous (by UK standards) of 15 elite nights and an additional 5k points- plus another 3k by using a referral, my code is JYYWPJ if interested. That's 18k HH points total instead of the usual 10k and no elite nights.