it does seem a bit OTT , but where to draw the line? you were gettig paid by your employer so technically you should only do their work, and there is no way i would have capped a supply in a non cutomers house, if SE do what you want, but as employee i can just see the hassle if you do TT and there is an issue later, all sorts of legal hassle will follow, say you did a TT and found a drop (you could smell gas, so its likely) so you cap the meter and tell the punter to get a gas engineer i to sort the leak, then the house blows up because there were 2 leaks, one on the outlet that you made safe but also one on the inlet that wasnt identified/rectified, "but you didnt tell me to phone the supplier, you told me there was no panic as you had capped the supply, and i was gonna call my mate on saturday"
CYA at all times, if you must enter the property, turn off EVC, ventilate and advise them to contact supplier then get out of there, technically your emplyer can moan at you for working on your own job and using their material, ok its extreme but if they let you off another guy will get caught changing a boiler during the day as a homer and will say "im only doing them a favour as they could smell gas" haha
PS well done for caring and doing the right thing, but in this day and age im not sure i would have capped it
