We have just checked with the BBC Weather Centre and Mill Hill is already basking at 30 degrees at 10.30 this morning.
We look set for some very high temperatures this afternoon !
We will keep you updated later today on the heat - we advise coming to Broadway and sitting in the shade in the cafes and drinking coffee and iced water or milkshakes or Frozen Yoghurt ! Plenty on offer on Broadway - many stores are air conditioned including M&S and so you can find respite in the shops as well.
Enjoy the sunshine. The park is very enticing for Sun Worshippers but it may be too hot for many. The cafe in the park is open.