Thanks to all who have responded, this forum is a very helpful place :)

Having a subroutine calling another subroutine would work really well for my case. I have no idea where I got the idea from but for some reason I was under the impression this wasn't a good thing to do but after reading the replies here and doing a bit of other searching it seems like quite a common way to do things as long as the flow is still logical.

Much appreciated