Huel is a success!
For a long time I would struggle with my commute and would have to use the train toilet or even toilets at Waterloo every 30 minutes.
Since taking Huel my digestion slows down. I sleep for longer. It has helped me and my case. As for the benefits on weight gain and muscle growth - that’ll have to wait until I’m training again and that may be a while 
Thank you everyone for your comments.