Signals to other road users
Brake light signals
1 signal, in the order the Highway Code lists them. Each one has a page of its own, so you can link to a single signal.
Every one, in the order the Code lists them
What the Highway Code says about this group
This signal should not be used except for the purpose described.
The rest of signals to other road users
3 more groupsOne search covers the whole Code and the whole library
Nobody looking something up knows whether the answer is a rule or a signal, so there is one field for both, and neither needs an account.