Gave in notice. Client wants me to leave one week early

[sal]

Well thanks for the advice, seems the consensus is clear which is I don't really have much to stand on and not worth the hassle anyway. Appreciated the quick responses - I just felt it was a small minded move from the client (especially wasn't told in person / they have worked from home since announcing the news).

Reason I am leaving so quickly as I have been given a dream opportunity abroad in a permanent role, so not something I can turn down.

Why do you think it's small minded? Maybe they have already found the ideal replacement and are no longer seeing value in your services. Especially when according to you, you have no knowledge to pass on. Sort of the same reasons you are cutting the contract short.

[jmo21]

I believe I should be entitled to be paid for 20 days notice, irrespective if they want to terminate early.

you couldn't be more wrong (in the vast majority of normal cases).