Old article now, but see below, direct from PGMO (now PGMOL):Fuck all in there that says 30 seconds for stoppages, subs or owt else.
Keep digging mate
Q&A: What are the rules for stoppage time?
After the controversy at the end of the Reading-Arsenal League Cup tie, just what exactly are the rules of added-on time?
www.bbc.com
“Is 30 seconds added on for each substitution?
As a rule of thumb, yes. But if a player is doddering, meandering, then extra time can be added. And it's the same for red cards, yellow cards as well.
Is the clock stopped for goals?
No, it's not. But they do add time (to cover celebrations). It's around 30 seconds as a rule of thumb, unless they spend five minutes celebrating. Every situation is different, they'll take each one on its merit.”