Event Medical Services

Hi All, I am just looking for some advice as radio is not my strongest point.

I am in the UK and are in the process of setting up an event medical service. We will mainly be working outdoors generally in confined locations such as parks. But also need them to work in doors too.

Which will be best VHF or UK and why?

I look forward to hearing your views and any advice you can throw my way.

Thanks in advance.