lisalisa DH is home and sitting here with me, he wanted to have a read, here he is....
MrFlowery:
(How can I have any credibility with a name like that?! ) Anyway, if the client has contacted the senior partner of your present firm and announced he wants to take his business to your new firm, he is perfectly within his rights to do that. As you well know, freedom of contract is a key feature of English law. I cannot imagine that your present firm would even try to prevent its clients from going where they want (or indeed that a client would ever agree to such terms)?!
As far as your restrictive covenant is concerned, I am assuming that it prevents you from soliciting clients from your present firm for a limited period of time. Soliciting would require you to actively seek your client's business at your new firm. I assume from your original post that this is not the case: you have clearly not solicited this work - the work is moving with you. If your restrictive covenant is any wider than that, it is unlikely to be upheld in a court of law.
In reality I suspect your senior partner realises what a loss to his firm you (and your clients business) will be and is simply trying it on. I have to add that if this is the standard of advice from your present firm, you (and your client) are better off elsewhere.
Flowery again:
Hope that was useful lisalisa. Obviously my lovely DH (he's reading over my shoulder ) is v knowledgeable and experienced, however he is not an employment lawyer, and obviously hasn't seen the wording of your covenant. I think it would also be a good idea to do what minty says - someone you know will know a good employment lawyer who will have a look at it for you I would think.