For the actuarial graduate programme in London, is it located in the London Canary Wharf office or London Bridge office?

FSO is in canary wharf, UK&I is at london bridge

Will I be able to change office during the grad programme?

Unfortuantely this isn't encouraged :)

Thanks!

Does the region indicate the office in the offer letter, like this?

Region:
Financial Services - Consulting

And can EY change this when you join?

Financial Services is FSO so you will be based at Canary Wharf

You won't be able to change business unit once you join us

Okay thanks!