Without going into details, I have a lot more money in savings than I used to and stupidly followed some advice that it would all be sorted by HMRC because the banks send all the info to them. I have been paying a lot more monthly to them for quite a long time now out of my pay because they adjusted my tax code. Based on my calculations, they're actually going to owe me a refund as they're taking more than they should have.
I have a question I'm happy to put forward here as I'm not giving any personal details. Many years back when my now wife and I started living together, she opened up a new account with her bank so that we could both pay into it and use it as a household bills account. She put it in both her names, which had the effect of putting my name on all her accounts, including a savings account. It didn't matter then because I was nowhere near passing the threshold. Now I have, do people think I'm going to have to include those details in my return, even though the interest earned from that account is hers, I've never seen a penny of it?