You need to check the vesting period of the pension scheme. It will probably be 2 years.
If you leave before 2 years membership of the scheme, you will get your contributions back, net of 25% tax, but no employer contributions.
If you leave after 2 years, your contributions and the employer contributions can either be left in the scheme to be invested for your retirement or transferred into a bond with an approved insurance company, also for your retirement. Once you have been a member of the scheme for more than 2 years, you can't get the money back until you retire.
Transferring the bond abroad may be fairly complicated - I'll leave that to the experts to comment.