Termination clauses? bit strong?

[Wanderer]

These are days I have worked. The timesheets are being singed off as I speak and will be invoiced on the 7th December. Would I be ok to leave on that day?

No it isn't OK to just leave. Go and talk to your client talk to them first. Coming to an amicable agreement with regards to terminating the contract is always the best way to go. Once you've done that, speak to the agency and tell them what's going on.

Be aware that the agency will try to pocket all or part of your final payment and if you opted out of the agency regulations then you are going to have a fight on your hands. Get the client on side first and you are in a much stronger position to fight the agency if they try it on.