The security rules, on cabin baggage, are the same for all flights departing from any EU airport (and also from a few other countries). They can be viewed here:
http://www.dft.gov.uk/transportforyou/airtrave l/airportsecurity/
The general rules for what you can, and can't, take in the hold or in the cabin are determined by IATA, so it doesn't really matter which airline's website you look at. The rules will be similar. For Ryanair's rules on cabin baggage, see here:
http://www.ryanair.com/site/EN/faqs.php?sect=b ag&quest=prohibiteditems
Their rules on hold baggage are here:
http://www.ryanair.com/site/EN/faqs.php?sect=b ag&quest=prohibitedchecked
You can buy suitable plastic bags, for the liquids in your cabin baggage, from Tesco, where they're described as 'Resealable food bags - Small' and sold in packs of 25.
Chris
(PS: The easiest thing to do is simply to take roll-on antiperspirants and pack them in your hold baggage. Most aerosols contain around 200ml or 300ml of liquid, so they're automatically banned from cabin baggage).