You'll need a timing belt kit Jack :
https://www.ebay.co.uk/itm/Timing-Be...7/251175608064
Comes with new tensioners (which have been known to fail on 100k+ engines) and you'll almost certainly need a water pump as well. Also ensure your garage replaces the antifreeze with the same type as you currently have which i seem to recall is ethylene glycol (blue or green) and tell them under no circumstances to use OAT (the red stuff usually) if that is the case.
Some water pumps on ebay :
https://www.ebay.co.uk/itm/Waterpump...E/223557126275
https://www.ebay.co.uk/itm/FIRSTLINE...v/291838733384
First one is NOS clearance by Sutton Auto Factors (buypartsby.com) so is cheaper, second is a Firstline water pump for about £35 so between the timing belt kit and pump, it's £150 plus the antifreeze and labour.