This is on Wednesday 6th, yes? Would half two be alright, and I'd need to be on my way around four? ToddlerSLTD's nap is out of sync with literally every other toddler on the entire planet at the moment, and naps late morning.
Other suggestions welcome, but there's a Caffe Nero on Stratton Street (the street opposite Green Park - stand with your back to the entrance to the park, and there's an M&S on the corner of the street, I think) which is close and simple. W1J 8LN.
I have short dark hair, glasses, a blue buggy, a blonde toddler, and a large sharp axe.