I used a broker for my B&C – he found an insurer who’ll cover any bikes under £5k without having to declare them (simply have pedal cycles on the insurance). The only stipulation is that if they are stored in the garage/shed they are locked with a Gold Standard Lock to an immovable object.
They are also covered new for old and I am able to source the replacement from a retailer of my choosing.
Premium is pretty competitive too (quite a bit less than pedal cover wanted).
Also, when you do have a claim you deal with the broker not the insurer and it’s the broker who’ll assess the claim and make any authorisation (I know this as I have had a contents claim (not bike related)) which makes the whole process much easier.
Email me if you want his details.