Hi Monty.
Three welcomes. One to the great world of railway modelling; a second to the world of AnyRail and a third to this forum. I'm not too familiar with Hornby as I model German outline so take my comments with a pinch of salt.
First thing I noticed was that you have two reverse loops in your layout. I don't know how much you have boned up on model rail design so if you know this already fine but if not, be aware that these can both lead to a short circuit as they join what was the outer rail on entry to the loop to the inner rail on exit. There are several ways round this but none of them are tidy. Personally, I would ditch the left hand reversing loop, one is enough.
I am also concerned about access. From the shape of the layout, it looks as if this will be against a wall;; if I am wrong then ignore this paragraph. Assuming that the top and left edges are against a wall then you are going to have real problems accessing the right hand end of the station area and ends of the sidings. And, talking about the sidings, if you are only running one train at a time, no problem, but if you wish to run a train on the main circle and shunt at the same time the shunting activities will get in the way of the main line. Most sidings are fed via a headshunt. However, the right hand reverse loop leading into the branch line prevent that.
Looking at the branch line, you have a very short platform there and, if you are working steam, you will have to work a push-pull service. Also, the platform is really a bit too short to be used as a headshunt. I would suggest you rethink the branch line and try to simplify the run to it.
Irrespective of whether you take any notice of what I have said, you have produced an interesting layout that could give you many hours of fun. In the end, that is what it is all about.

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With best wishes,
Chris.