Painting snow, on paper that doesn't hold pastel willingly, without any white pastels. Must buy some.
Haven't mastered the 'less is more' pastel technique yet, but I will....

And if you've noticed the excellent 'Led by donkeys' Brexit campaign on social media and on billboards around the country, there's a link to their crowd funding page via marknlizzies blip: https://www.blipfoto.com/entry/2539277056215092904