The latest model runs (summarised) show 90+mph winds for the Brest peninsula and Channel Islands, perhaps 80+mph for some parts of cornwall (ukv shows 90+) 70-80mph along the south coast, perhaps a little higher in the far SE. Inland the speeds look much less fierce, models showing anywhere between 40mph to around 60mph depending on location. In these areas, unless you are affected by trees falling down or a power cut, some of you might be wondering what all the fuss is about.
There is still quite a lot of model variation in actual wind speeds. There probably will be until the storm actually hits.
Some big caveats to the above as well - a shift in the low pressure centre of even 25 miles say, would make a big difference to wind speeds experienced. It's not sensible to step outside to go for a nice windy walk in the forest (extreme example) because it isn't currently that windy where you are in an warning area.
If you are in an amber warning especially, take heed. Don't travel unless necessary. Don't go and try and watch the sea from a promenade (!) If you park your car under a tree normally, or if you are worried about tiles coming off, you might want to move it a bit.
Anywhere in the yellow or amber wind warnings area should make sure that trampolines are secured and everything that might blow away is put away. Make sure you know where your torches are and that your devices are charged. It's kind to check on vulnerable neighbours to let them know you are there for them and that they aren't too worried.
It is possible that a red warning might be issued for parts of the SW, I don't know whether it will meet the threshold for this though.
Flooding once again is a risk. There will be a fair bit of rain associated with this storm. The ground is saturated in many places and so it doesn't take much additional rainfall to create floods. Indeed, some places are already/still flooded.