A lot of the frost had melted when I walked round the park, but it did seem to stay longer on the bowling green than other grass. Not sure I can explain that.
Frost in the long shadow of the Albert Memorial was also taking longer to melt. I should think it is warmer where the sun shines.
A bush with pink / red berries is popular with all sorts of birds. Somebody might recognise the bush.
Scattered light through branches is reflected by mist to make shafts of light?