On-the-spot fines: has anyone been in-the-spot to fine anyone?

The by-law enacted by EDDC regarding feeding seagulls has hit national headlines again:

http://www.express.co.uk/news/uk/840603/Seagull-attacks-feeding-birds-fine-food

But has anyone ever been fined?

Same with dog fouling – the fouling is still there but where are the fines?