Well after half a day of googling...following links and going down blind alleys i think i've got it....oh please i hope so my head hurts.
Its a Linksys WRT54G3G-UK Wireless-G Router for 3G. It works with vodafones 3G data card and i've checked on Vodafones coverage map that there's 3G in the areas we will be working. i think the cost will be fine too cause we will only be sending emails and surfing the internet. So fingers crossed this is it...if anyone knows different...give us a shout before i spend the cash will you :)