Your Long-tailed intruder is certainly a cutie. I love how the little tit has ruffled it's crown feathers to appear tough.
Thanks Florence. Although it was doing that it was very passive. I just picked it up off the windowsill. It was interesting that the others in the tribe were very agitated on a nearby branch while I was taking the photos. They had obviously realised they were one short and were aware of what was going on.