Mobile Broadband Modem/Dongle - PAYG

[squidgelet10]

Greetings each.
I am considering making occasional short trips away from home in my caravan, which is equipped with a 230 volt generator. I would like to be able to keep a check on e-mails etc if/when away from main computer.
Does anyone know of a cheap, reliable mobile modem system for OCCASIONAL use which I could use on a PAYG basis please: preferably using my existing mobile 'phone number?
I am presently using Orange PAYG, but don't see anything appropriate on their website.
Any information would be appreciated. :-)
Be good!
Cheers.

[Count-A-Strong]

pRobably be cheaper to swap your phone for one that can receive emails.