Abundant resident.

Although birds of open woodland, they have adapted well to the suburban environment, using gardens for feeding and, breeding where nest boxes are provided.

As with other Tit species they form flocks in the winter, one such flock seen at Norton Green in 1992 numbered fifty Great and Blue Tits. 37 were also counted in an Oak Tree in Wellfield Wood on 10 November 1974.

They were confirmed as breeding in every tetrad covering Stevenage in the 1973 and 1992 Breeding Atlases and, from ten in the 2012 Atlas. 

An unusual nesting record is of a nest with young at the Stevenage Borough Council Depot canteen in 1981 where a knot had fallen out of a plank.

The 2012 Winter Atlas confirmed their presence from all 11 of the tetrads covering Stevenage.

The Common Bird Census at Watery Grove recorded them annually as holding between three and thirteen breeding territories between 1972 and 1999. As they were associated with the, “standard” Oaks in the wood rather than the coppiced Hornbeams, coppicing seemed to have little effect on their variable population. 

A nestling ringed at Box Wood on 28 May 1980 was killed by flying into a window at Saffron Walden, Essex on 31 August 1980. 167 were ringed in Box Wood in 1980 and 267 were ringed in Box Wood in 1981.