Gas fittings are these push fit?

[Retroelec]

Hi guys.
Not a plumber just a sparky.
Did an EICR on a rental and was looking for the non existent gas bond and just wondered out of curiosity if you can use push fit on gas pipe? Or are these something else?
I have only ever noticed soldered joints by meters before.

 

[Allgoode]

Looks like press fit & ok as long as correct o ring seals are used

 

[snowhead]

They're called Press fittings, push fit initially then crimped, hence the marks in the fitting.

Used with one of theses or similar; REMS Mini-Press ACC Kit - https://www.bes.co.uk/rems-mini-press-acc-kit-20519/

 

[ShaunCorbs]

looks like x press and as above ok to use