I too have been doing my bit and am topping up my feeders and table 3 times a day to cope with the demand.
I got in from work at 3pm today and went straight out with a supply of crushed fat balls, (the reason I crush them is to stop the larger birds such as seagulls flying off with them) and fresh peanuts. When I came back in after a few minutes I noticed a great tit, sat in the snow hardly moving, I monitored it for a few minutes before heading out to see if he was ok, he stayed still until I got to him and he then with great effort flew to the lower branch of a tree in our garden. Wanting to help him I went over with a generous helping of nuts and threw them onto the ground near him. He never went to them, I cameback in and continued to watch him, he struggled back to the bird table and has been courageously attempting to eat but I fear he is not a well little bird. He eventually hopped off to the ground where he remained immobile, the night has drawn in and I have lost sight of him. As a wildlife enthusiast and animal lover it pained me to see this little fella in so much discomfort and anguish and not being able to help him more than to give him food.
I would urge everybody to spare a thought for nature and wildlife during this long cold spell and throw out any scraps no matter how small.
It is down to human kindness that any of these small birds will survive this.