I got my passport last Friday along with all my application documents.
Checked my passport and was elated that I got the visa. Quickly looked through my stuff and it didn't seem like anything else was included.
Today I've been able to properly sit down and look through the docs and I just noticed that an envelope was hiding between the papers.
Pulled it out and it's a VFS envelope with my name and application number and "MEDICAL FORM" stamped on the front. Nothing inside it.
What am I supposed to do with this? Am I supposed to get some sort of medical done? Why was I not formally informed about this by the staff if it is needed?
I mean, if I hadn't bothered to look through all of the papers it would have never caught my eye!

I'm going to phone VFS tomorrow and enquire but any first hand information would be great.
P.S. Is there a time limit as to when I have to return to the UK? I might be able to fly out only in a month or two. Are there restrictions on how soon/late you can enter the country?