Study of Euan Uglow Painting- 'Model Climbing Stairs Rear End'

I've been looking at a lot of work by Euan Uglow, I really admire his brushwork and how he manages to get quite flat plains of colour without losing his expressiveness.

I find that by copying artwork I can learn more about their technique and appreciate their style in greater depth.  I chose 'Model Climbing Stairs Rear End'.  This is my version:


This is the original...I like to think that my version isn't far off!  What do you think?