According to the RSPB the most common bird is the wren but most commonly actually seen is the sparrow.
I don't want to count the feral pigeons in my garden, but there are far too many!
Feral pigeons are far less common in the countryside. We have four resident Wood pigeons, collared doves, dozens of sparrows, a few wrens, blue tits, great tits, blackbirds and starlings. Fairly typical I think.
Yesterday the RSPB published the results of the Big Garden Birdwatch. The house sparrow came top as the bird with the highest count. It is not a popularity contest.
The blackbird was spotted by the highest number of people and the sparrow was recorded in the highest numbers. Naturally as they live in larger groups.