There's a lot of this going on at present. Pretty much all insurance has gone up 20-30% some 100% plus, much depends on your location, your employment and if you add commuting, anti theft kit really gets you very little if anything these days. Last year I had a similar experience mine went up by £90, shopped about got it for same as I'd paid year before i.e. no increase. I'd been with the company for 25yrs, loyalty is worth nothing nowadays it really isn't. Some are saying they have seen no, or even a reduction in their renewal, its a real lottery. Cynically some are just profiteering, plain and simple.
Shop about, but expect a 20 - 30% increase, over last years premium. This I'm told is due to, wait for it................ supply and cost of parts/materials due to Covid (profiteering more like) and pot holes!