Isolation switch for boiler supply?

[cadspark]

Been asked to look at a house on a small development completed about 5 years ago. Really messy situation involving builders and houses having no completion certificates or even planning permission in one case. Gas central heating is installed but the boiler is wired up straight to a 6 amp circuit breaker with no means of isolating seperately. As the boiler and cu are both in the kitchen would you deem the circuit breaker as adequate as a means of isolation if not ideal as installing a switch would involve messy chasing and retiling work.?

 

[Octopus]

The world seems to have gone isolator mad these days!

I'd say the world has gone RCD mad and thus isolators are more important than ever!