I have used Brownhills as my broker for the last few years and through them insure with AXA.
As someone has previously mentioned they can also sort out your contents insurance as well.
Link here link
The AXA policy is quite flexible.
Your collection does not have to be exclusively art, it can be a combination of things so if you also collect antiques they can also be covered.
You will need to keep an up-to-date inventory of your collection which most of you probably already do.
There are a couple of exceptions the most notable of which is watches.
You can insure in increments of 50 K
They don’t require valuations as long as any one piece of your collection does not exceed a third of the value of the total insured.
For example just to be clear:
If you insure for a total of £150K you are covered by default for any single work up to £50K
If you insure for a total of £300K you are covered by default for any single work up to £100K
If you insure for a total of £600K you are covered by default for any single work up to £200K
As for security they don’t require a monitored alarm if you are insuring up to a total value of 500K
Over that value they do insist on a you having a monitored alarm.
I also don't work for Brownhills or have any connection with them,