Ok, now there is great debate about whether you need neither, either or both of these. Some say that a cylinder of nitrous carried in any vehicle MUST result in BOTH diamonds being displayed. Others argue that it clearly states that this is only if gas is carried "loose" AND is not an integral part of the vehicles own system.
Personally, I am not going to get drawn one way or the other, but if you would like to download these and print them out (laminate too if you fancy), then please feel free. There are two images here, so you can download them individually if you only require one.
Please note that the images print VERY clearly on paper but look a bit "grotty" on my screen. Go figure.
If you have a colour printer, they can just print them straight off, if you only have a black and white printer, just use a photo editor, convert to black&white, then increase contrast until you just have black on white. Then pop in your sheet of yellow or green paper.
Or send me £5 and an SAE and I will send you back two yellow ones and two green ones for you to cut out and plonk where you wish. Diamonds are 100mm x 100mm, printed on photo paper and then laminated. Theylook quite respectable but really aren't worth £5 because the materials are cheap enough < £1 - but it takes me 15 minutes to do and 10 minutes to go post them. If you want them, you are hiring me for 25 minutes and getting free materials worth £1 into the deal. Bargain - and I can get a pint too, so we are all happy.