Gas Hob instructions say no plug

[roys]

Went round to my mates today to help him fit his new gas hob.
The instructions for the hob says Do Not Fit A Plug and at the cable end there is a sticker saying Do not fit plug.
Why are they so against connecting it via a plug, I did fit it via a fused spur down rated to 3A but I just don’t see what the issue is, am I missing something or having a foggy Monday?

 

[Sharpend]

Possible arcing and gas leak?

 

[Geoff1946]

Maybe to ensure its always earthed. Was there any separate earth bond point?

 

[roys]

Thanks for the replies.
No separate earth point and just a standard 3 core 0,75 mm2 flex.
When I fitted my own a couple of years ago, mine went on a plug and into a single socket under the worktop.

 

[binky]

fitted loads on plugs, can't see any issue with that as it's only for the ignition. Perhaps they are confusing it wth an electric hob?

 

[Murdoch]

We only have to take into consideration MIs

Fit a plug with a 3A fuse and move on

 

[roys]

Fitted a spur and moved on, just curious as to why so insistent on no plug, I hate things where I can’t see the logic.