Great spotted woodpecker

I saw three Great Spotted Woodpeckers ( Dendrocopos  major) today on Streatham Common, near the paddling pool at the top and in the woods, where a flash of bright red whizzed past me. I think one of them was female as she had a yellow tinged chest. They look really exotic to me, it's always a pleasure to see them. As described in guide books, one was either feasting on insects or fastidiously cleaning the area around it's nest, the RSPB says they have a 'distinctive, bouncing flight', this was also clearly on display today.