sara3 is right - the marking on the 'heads' side should be upright in the same direction as the Queeen's head (does that make sense? I think the Queen looks a bit chubbier - not really head and shoulders, just chubby face and neck. Also, if you scratch them, the 'gold' colour comes off.
If you can afford to shop at Sainsbury's then you can afford to lose a pound. There are a lot doing the rounds in Shrewsbury, as well, by the way, so look out for dark dirty looking coins, as these are fake.
Sorry, noone likes to be cheated out of their hard earned cash, so you could try taking it back. I always take my fake ones to P****L*** (Europe's leading one price retailer), and they always accept them.
If a dog gets its' tail cut off, does it go to a retailer?
Wow never heard of Sainsburys being described as a expensive supermarket before...its hardly Waitrose or M&S.
The treasury seems to be cracking down on the fake coins in order to get them out of circulation. Problem is that in 2006 there were about �10,000,000 worth floating around and that figure is likely to have increased by now. At the current detection rates it'll take around 120 years to find them all.
Serious question -
What do you do if you get one? How does the Treasury get them out of circulation?
For example, if I take it to a bank, will I get a genuine coin in exchange or be arrested?
I can only use it for the supermarket trolley - anyone got any other (legal) uses?