Thanks chaps, Wozzy, will check for you next time I pop outside. The one I bought from eBay doesn't seem to be there anymore but it's the same as this one:
https://rover.ebay.com/rover/0/0/0?m...2F292672140859
Jaguartvr, I had considered running the hose up the wipers. I'm not quite sure why I decided to go with drilling holes in the bonnet to be honest. It was probably just because I had a couple of squirters spare and it was a job that needed doing.