I understand – although TBH I’m not convinced the roads in my part of the world are any better in the summer either, so my good bike is still 28mm capable / disc braked, etc.
But yes, that Boardman one looks perfectly capable although the 650b wheels would put me off a bit, make sure they’ll take 700’s with decent sized tyres for a proper road alternative if you think that you might do that.
My winter bike is a cross bike, for the same reasons – but a cross before gravel became a niche in its own right. So it takes guards, has bottle bosses, etc, as opposed to a race crosser. Check out the CRC Vitus ones, or the Arkose as already mentioned.