No no. The preceding comments directly reference mug based brewing methods. Besides, even if you are using a pot, milk first ruins your control over final levels of milkyness as it is too easy to too add too much. Milk first just doesn't work for standard English breakfast tea.
You wot m8!?
Tea is an infusion. Milk is an emulsion. Emulsions inhibit infusions.
Science bro. Do you even?