Not very (ecologically) green green tomato chutney

I am having trouble with slugs and snails eating my tomatoes. I did try picking just before they were ripe, but then they started eating those!

So, Tuesday, on my day off, I picked 2lbs of green tomatoes and made green tomato chutney. It involves 2 1/2 hours simmering, so using up a lot of gas!

It smells nice, and the scrapings of the pan tasted nice - though not spicy but that will happen in the 3 months I have to wait.

I have 3 jars of chutney which should be ready for Christmas.

old jam-jars banned!

"Please take note: this looks like a spoof but it's not" .warned the Churches Legislation Advisory Service leaflet I received at work

They warn you reuse jam-jars at home and for private gifts for friends, but you are not allowed to  make jam, chutney, etc, and put in reused jam-jars to sell or give away at a public event!

CLAS contacted the Women's Institute,on the assumption that if there were a flaw in all this the WI would have spotted it. But no luck!

I know someone who makes a lot of jam and chutney which is sold by various local groups she supports. The fruit and vegetables come from her allotments and from hedgerows, but the sugar etc she donates. The extra cost of buying new jam-jars would be very unfair.

And why? What danger in practice does reusing jam-jars cause?!