Average Insurance Group 10 depending on the Deauville model / modifications.
The Honda Deauville is a great cruising bike with ultimate reliability and with enough punch from the SOHC V-twin to accelerate competently, even overtaking on the UK motorway is easily within its capabilities.
At the weight of a sumo wrestler the Deauville isn't going to pull away like a Blade, however its weight, chassis and even choice of tyre size make the bike easy to control even when it's fully loaded.
This motor has been around for the last 20 years plus and is basically unchanged. In short, it's a train and will last for miles and miles..
For a cheap motorcycle insurance quote on the Honda Deauville, Powerseeker can help you by comparing loads of polices from insurance companies throughout the UK in order to save you money and get you a cheaper premium.