Last lockdown I brought 75 kg of mixed seed, peanuts and nijer seed which the birds that used to come didn't touch (they liked the suet blocks and the mealworms however).
There was an incident involving a stray cat which murdered a bird in the garden and the birds stopped coming - the mealworms and suet blocks are also very expensive so I have stopped putting them out.
If you are in London and feed a variety of birds, please may I ask what bird seed you use? Clearly amazon is below my feathery snobs.