If the weather in the UK
is crap for scooters, then it's crap for bikers too, but that doesn't stop people buying bikes. The weather is not the issue, rather than an inbuilt prejudice against scooters by "real" bikers.
The thing is, car drivers can still ride a 125cc scooter on their car licence, with an L plate. They can't go up in capacity until they have a bike licence, and I would assume that most can't be bothered. I would suspect that that is part of the reason for the sales figures for sub 125cc category scooters.
As a biker, I have a scooter too, an SH300i, and it does exactly what it says on the tin. With a 35 litre top box, it's very practical, a doddle to ride, powerful enough to more than keep up with traffic, and I use it for local runs to the supermarket and other short distances where kitting up fully seems to take as long as the journey. Helmet and gloves will do fine, at least in my head, if the journey is under 10 miles or so.
If you are a biker, and have the finance, you could do worse than look at a scooter as a second bike for commuting. If all you want is a scooter, then this one will be as good as any other. If you can only afford one machine, then as a biker I would stick with a motorbike, assuming that it will still outperform the scooter!