London Great/blue tits 2019

Be interesting to see if they do start bringing in nesting material Pete.  Looks promising.  Don’t give up hope cause although great tits are usually a bit earlier than the blueys las year a friend of mine had great tit chicks after blue tits had all but finished.  May have been through a failed nest or maybe they start a new nest for when the first ones have fledged?  Don’t know much about great tits.  Good luck.
Sue