Cassiobury Park - 3.8.23

 Whilst carrying out some work in the park ready for green flag award judging I popped to the van back in the yard to get something out the back when I counted no fewer than 48 birds flying through between trees. The flock was mainly Blue Tits but with a reasonable number of Greats with the odd Goldcrest too. Later on I first heard then picked out 3 Crossbill as they headed high NE over the tennis court area.