Hi AK5294,
In response to your question last week, I'd recommend visiting both Swanwick & West Drayton if you possibly can as I found they were both very useful but different. It was good having seen the area control in Swanwick, to then see the approach controllers at work. I had very different experiences at both and I think that the more you try to see on your own, the better bit looks as it shows you've put the effort in and really have the interest. I now just hope I can go and visit a tower soon!