A couple of what I think were Goldfinches in the back garden, if I've found the right birds from the RSPBs website.
They were very small birds, with a very noticeable red patch on their heads. They were quite low down, on plants, very near the ground. Luckily Talisker wasn't around, or was snoozing (as he is now), or they would have supplemented his diet.
I grabbed my camera, but they'd gone by then. I'm watching out for them, they were very attractive looking birds.