There's more information at the link above, but these 2 paragraphs should give you the gist:
"The UK Technical Communication Awards are open to any individual or team, whether employed, self-employed, contracting, volunteering, permanent, temporary, full-time or part-time. You do NOT have to be a member of the ISTC to nominate someone, and the nominee doesn’t have to be to a member of the ISTC either. You can nominate yourself if you wish; the judges’ decisions will be made solely on the merits of the entries, not on who nominated the entries.
We encourage entries of product/process documentation and technical innovation – the “traditional” entries – as well as entries such as blog posts, books, training material, e-learning and anything that displays, encourages or helps the production of high-quality technical communication.
There are some rules to follow, so take a quick look at them before you start nominating. Check out the 9 categories that will be awarded and to nominate someone, or to nominate yourself, go here. Go on, you and your team deserve it!"
I'll echo the last 2 lines - technical communicators don't always get the credit they deserve, and these awards are a great way of showing off your achievements. I know it's not the British way, but it is genuinely OK to nominate yourself! No-one cares as much about your documentation as you do, and if anyone deserves an award it's the unsung heroes like you who do so much to make life easier for your users.
If you've got any questions you can fill in the form here and the ISTC Awards team will get back to you very quickly.
Nominations close on July 15th 2016 - 5 days from the date of this post - so don't delay, nominate today!