We are coming from UK to Orlando at Easter which falls between two launches. Will the rocket for 16th April launch be viewable on its launch pad a few days before launch?

I just left maybe a couple hours ago and I didn't see it. BUT you do get to see pretty much everything on the bus tour. It really was worth it. And I will be going back. I didn't learn enough!

You can see it on the bus tour but I do not know if you will be able to get any closer than that

My best guess is yes, you would. You can call the space center and ask though.

On the bus tour you get to see launch pads 39A and 40, both which are currently used by SpaceX.

Only if you are able to take a tour. They are NOT visible without taking a tour. Have fun.