Restriction of trade?

[Wanderer]

So you weren't opted out, since that needs to be done in writing before being introduced to the client.

Agents typically don't understand this - they think it's EITHER when you are introduced OR when you start, therefore it's when you start. This is not correct - it's not that they read the rules and it's too legalese for them, it's generally that they can't understand grammar.

I agree. I would say proceed as if you had not opted out on the basis that either the opt out was invalid because it was done at the wrong time OR they made opting out a condition of doing business which is illegal.

They will scream and shout about it but I'd tell them that they can argue their case in court....