Equipment:
Canon EF 70-200mm F/4L USM @ 200mm f/4
HorusBennu Tripod C-3540V, LX-5 Ball Head
Hutech Modified Canon 40D
15 x 60 second exposures @ ISO 1600
Processed in DeepSkyStacker, Lightroom & Photoshop

Comments:
An improvement on my last effort in 2013 now I have the iOptron Skytracker. A difficult target at only 10 degrees above the horizon. Thanks to Graeme Quinn for the gradient removal. Also shown just to the left of M31 is the faint satellite galaxy M32.