Given how different UKMO and GFS are at 144hrs I'm expecting yet more very early, very wide spread in outcomes in tonight's ENS. Wonder what ECM will bring. 3 kinds of scenario now on the cards up to next weekend:
1. High pressure hangs on and expands, giving us record breaking heat as per 06z
2. High pressure breaks down from W/SW with a slack, thundery breakdown and northern blocking as per UKMO and the last few GEMs
3. High pressure eased away from NW with a cool but settled airmass ridging across the country, as per GFS 12z and this morning's ECM
Brockley, South East London 30m asl