If that storm takes the predicted track, and has sustained 80mph winds (not kph) as is predicted for places in the south and southwest, and southern midlands, then there will be serious damage, and probably loss of life. Rochey is spot on about the factor of the trees still in leaf, and also with leaf-fall starting at this time of year and being hastened by winds like these, flooding will be worse than otherwise.
The ameliorating factor is that it’s not a vast storm by North Atlantic standards, quite small in extent, only limited areas of the country will get the worst of the wind and rain, and it won’t last long, unlike some slower-moving, larger storms we’ve had.
Though of further relevance, there’s potentially another bad storm in a few days, and possibly two further periods of very heavy rain, with the south and then the east very much in the firing line. All of this a knock-on from the extreme hurricane season that has happened in the last few weeks.