Go chat to NFU
I’ve got my cycling, fishing, and kitesurfing equipment covered under a standard policy simply being in a locked shed
The excess is tiny in comparison to other quotes for my kit, and other companies wouldn’t even cover my equipment that totals about 6000.
They cover all electronics as well for accidental, theft, water, both at home and away, even unspecified electrical goods and cash away from home
All claims from myself and parents through them have been excellently dealt with and minimal excess of circa 25-50 pounds depending on what got broken!
Edit – items over £1000 have to be listed on insurance, but no premium increase unless a ceiling limit is reached which as far as I remember is something stupidly high