What is the minimum notice for an employer asking you to work a shift?

if you are on call you're their slave forever. If you arent on call, they must give you 24 hours notice for you to be their slave for a normal shift

There is no minimum - they can ask you at the very last minute. They can't force you to say yes if you don't want to do it.

Anything about how much notice you should be given for a shift that you must work should be laid down by your employment contract, or by the rules of the place where you work. Again, there is no law about it.

Check your labour laws or if you're union check your union handbook.

They can "sack you" for just about any reason.

As for when can you work, I have finished one shift and asked to stay over for a second.

It was time & a half so I did,

They can ask you anytime. If it is not a scheduled time for you to work you can say no.

You have a life you know, and they have a business to run.

1 minute before the shift. There is no minimum notice law anywhere.

I'd often been told I need to stay for the next shift as soon as I sat down for a cup of coffee before leaving. At one old job.This job I am on call every two weeks and am often told I need to pull double duty (my own job and another's) the moment I punch in. Or, my own work stretches hours past the normal stop time. Depends on the demands of the task at hand.

Then there are always times I'm told my expected time off must be cancelled.

Life is unfair. Deal with it and prosper.

Where do you live? Makes a difference.

Generally, they can call you 5 minutes (or less) before a shift and ask you to cover a shift. There really is no law about this in any but the most regulated industries, such as airline pilot, or truck driver.

There is no link and there is no law in the UK. It can be 5 minutes or 5 days.

UK

Want to give us a location? I've been told 16 hours before I had to go in to work, but I work a standard "9-5" job so not sure if that is the same as what you are talking about either.