In the event of a gas attack, you have 2 minutes to hold your breath and get your respirator out of its bag and on your head?

Nothing to do with dropping food on the floor then ?

Nope... thats the 10s rule :-)

Certainly not if cheese is involved. (You need to see Mrs May's tribute to the Queen to understand that one.)

Who is Mrs. May, the North Yorkshire outdoor custard pie thrower? I think that you are all struggling with this simple 2 minute rule question, but I will award half marks for effort. Gets calculator: half of zero is .........erm.....? Will it be a negative answer......erm...?

Z.

What is the Two Minute Rule?

I suspect they're referring to the required observation time in the gas tightness pressure test.

   - Andy.

Gas tightness test has other stages, including let-by and stabilization.

Googling says "The two-minute rule is a tactic from the Getting Things Done personal productivity method. The premise is simple: if you have an outstanding task and it'll take two minutes or less to complete, do it now – even if it's not flagged as urgent or high priority."

Which sort of makes sense 

But the picture shows only electrical matters.

Z.

All tightness checks completed --- not ticked?

But the picture shows only electrical matters.

Top three items look likely electrical, but bottom 4 look more like gas to me. I guess smart meter fitters potentially have to deal with both these days.

   - Andy.