Yes 20 hours per week during term and 40 hours per week during vacation. Make sure you get a vacation letter before you take on 40 hours of full-time work.
No, there is nothing hidden; however, there are details of all their requirements on their published guidance, which can be downloaded and referred to from the UKVI official website.
NO. It is illegal to work on a visitor visa.
Well! There are over 1000 plus Masters degrees offered overseas. It depends on what course you would like to study. Have a study abroad query email info@gleamrecruits.com