Gas pipe routed through window lintel

[J3nnifer]

Hi, We are having a new boiler fitted and I returned home yesterday to find our plummers have routed a 22mm gas pipe out through the brick lintel above a 2ft window. Aesthetics aside, which I can live with, have they compromised the structure of the lintel?
Thanks

 

[freddiemercurystwin]

Photo's, type of lintel, etc?

 

[RandomGrinch]

Funnily enough, I just had the opposite problem!
When my bathroom roof was replaced, the builders found that the 28mm gas pipe was all that was holding it up!