Wow! Thanks for those two links! Great sites.
You're quite welcome and thank you for your kind words :-)
I hope that you will find the sites to be helpful, and do be advised that MANY more British slang information sites exist....you will get many hits if you search with keywords such as 'British slang dictionary'.
One of several variants on British slang is Cockney Rhyming Slang, which the BBC link discusses briefly. To this furry stoat's ears, Cockney Rhyming Slang is delightful to hear and can provide additional insights to British language, traditions and culture. Although it may be regarded by some as less than the very best of news sources, Britain's Sun tabloid is chock full of Cockney Rhyming Slang and oftentimes is a fun read just for that. You can see a couple of examples of the Sun using this slang here:
Balding star's wiggo Jacko (Experts claim Jacko wears a wig - One of the worst I've ever seen )
(Look for the Cockney slang terms 'syrup' for Wig and 'bonce' for Head.)