GFS 00z more or less similar to the last run, perhaps fractionally cooler (raw temps suggest 36c instead of the 37c in the 18z run) but really its practically identical up until Thursday.
It seems that in order to probably get our 40c+ we'd still have to see more westward movement to guarantee 23c+ uppers to sit over London. As Heathrow/Northolt are the most likely to be able to hit those temperatures. I suppose Gravesend isnt out of the picture either. Regardless its definitely apparent that we're gonna be seeing high 30's somewhere in the South East, unless we get some "badly" placed thunderstorms of course.
Not too dissimilar from the last one, seems slightly less heat to the west, but more up the east coast in this scenario. Temps should be similar to the ones shown on the ECM, UKV, ICON, ARPEGE.
EDIT: Ok thats definitely 38c
ICON indeed going for around 36c in the far South East, maybe even a tiny little area of 38c there? Hard to tell this far zoomed out.
GEM showing 36c in North London, 38c in the Norfolk area for Thursday. Wouldn't be too far off its rocker as long as you don't add ontop of those temperatures like the GFS/ECM.
Wed/Thurs temps on the Euro around the same before, 34c/35c ish which could mean up to 36c/37c locally, maybe higher but it really depends on cloud cover and how quickly that low moves in.
ECM 0z uppers seemingly the same as they were on the 12z (maybe slightly faster on being pushed out) keeping a decent amount of heat until at least Friday still. If anything it feels like the ECM and GFS are getting further away from each other the closer we get to the event...
A lot of the GFS ensembles seem to agree on the heat being pushed out by Thursday, but the main 0z GFS run itself doesn't agree. Split still exists although if taking it at face value, the even hotter scenario is looking less likely.
There's actually a UK equivalent of this website, showing in Celsius and the BST timezone.
https://meteologix.com/uk/model-charts/euro/united-kingdom/temperature/20190726-1200z.html
Met Office keeps extending the snowfall forecast here, lasting throughout the entirety of Friday and into early Saturday morning. Im having a hard time believing that will happen but we'll see
Interestingly the Met Office forecast for around here on their website suggests around 9 hours of snow. On their updated website, it suggests up to 24 hours of snow.