I was told no news is good news basically - they said if it had come back positive they would call within a few days and if it was negative they were slower to get back to you, so take it as a good sign!
No news is a good news. Thats what they say, if they have any concern then they will ring you xx
I had a letter in the post, I can’t remember how long roughly but I don’t think it was over 2 weeks x