The secret is to wear tatty jeans that are two sizes too loose in order to
reveal the ubiquitous "fundamental crack" at the rear. Then a roll of
20s in the pocket, and finally change your name by deed poll to "Mate" .
Everybody in builders and plumbers merchants is called Mate.

not to mention the reflective jacket - mate.

It does work. I went into toolstation dressed in work clothes - took 15
mins to be served and
they were rather patronising.

Few days later went in in tatty jeans and reflective jacket - same time -
same no of customers in
store - got served in less than 5 mins by a guy that was very helpful and
informative person.
The same one that was patronising a few days earlier