Usually yes, and more easily than later on, but probation isn't a blank cheque. You still need a fair reason and a fair, if shorter, process, and some claims like discrimination apply from day one whatever the length of service.
The trick is to actually use probation: set expectations from day one, give honest feedback early, and don't leave the hard conversation until the final week.
Every situation has its own details, and those details change the right answer. For a read on yours, take the free Employee Situation Check or book a call.
Watch
How to handle this, in a couple of minutes
Samantha talks through the practical steps.
General guidance to help you decide your next step, not legal advice. Employment law changes, so always check the current position for your own situation.