@monkeyhanger; Yes, it’s speculation on my part - I did say incidences of vandalism and theft
may increase - not that they would. Just throwing some possibles out there that might account for or contribute to increases in premium levels - and also that other non-lockdown factors such as winter floods may have influenced insurers rating actions as well.
At the end of the day, insurance companies are in business to make money and deliver profits for their members or their shareholders (and - so it seems from what you’ve said - if it’s Aviva, to meet the bonus expectations of their senior managers / directors

), so they’ll continue to increase premiums year on year whether we like it or not. For anyone who’s unhappy with premium their current insurer is asking for at renewal, then they’re free to vote with their feet and shop the market via price comparison websites or even use the services of a traditional insurance broker to get a better (cheaper) premium.