[Wiki Loves Monuments] Filtering the submissions for the jury: how to do it

I'd be interested to hear from countries that have experience from previous years how you pre-filtered the submissions for the jury. As this is the first year for the UK, we have no idea how many entries we will get, but it may well be too many for out three-person jury to handle.

I know that some countries have used special panels for pre-filtering, and others have used the Wiki community. What were your experiences, and what technical means did you use to help with the filtering?

Any insights on how best to handle this would be much appreciated.

Michael