Litthing Women's Bootcut Yoga Pants with Pockets Regular Tall High Waisted.
These are very stretchy due to having 25% spandex with 75% polyester. Front pockets, which are quite shallow but should allow for a key and a mobile phone. Complimentary cut which gives the legs a good shape with the boot cut bottoms. 
These are selling for £16 online and so this is a complete bargain at £8 per item. Enjoy :)