Picked up my Monty a couple of weeks ago and whats bugging me is a tinny rattly round when the engine revs - its like a background rattle sounds almost like a buzzing/rattle which I get mainly at low speeds and when its cold just wondered if anyone else had noticed this before I give the garage a call 

 

Injectors ticking. Well known noise. 

As fzrkev says, it's actually the fuel injectors. You can test this by driving at 30mph, under light to moderate throttle you will hear the noise, but when you take your foot off the gas, the noise will stop (as the injectors close). The noise is worse when the car is new with low miles, but with a couple of thousand miles on the clock it's largely gone away.

Thanks for your help - I'll see how it goes over the next few weeks and update you on progress