It's by a guy from Somerset in UK. Usually under the name darftwader I think on forums etc.
He does some really excellent shots of heavy rainwear and I love his work - unfortunately there's no website though
I believe those pics are from a guy who calls himself Simon Avery.
So every now and then I see similar pictures in a yahoo mailbox who's connected to a couple of rainwear related groups.
First post from me it's taken me a long time to get here but what a fabulous site! Not that I expect any less from Paul, I've spent ages just exploring.
I can confirm S. Avery is a real person too as he used to photograph my then girlfriend. A very nice taker of pictures I have always liked his work.
He used to be very active on rainwear groups but I haven't seen much by him of late. I may have an email for him though as we did exchange messages for a while.