If there's one 'trend' I'm totally all over this AW15, it's the Over-the-knee boot. HUGE for AW15 and, totally versatile, they are a must have for the new season. Wear them with pretty much anything in your wardrobe - I'll be wearing mine with a cute dress or over a pair of jeans.
The high street is swarming with lots of different styles. For me, Kurt Geiger has massively nailed it this season for OTK boots - I have my eyes on about 5 pairs of them from there! But, ASOS, Topshop and Zara also have some great pairs as well.