I had the pleasure of working with Ollie in the workshop in Cornwall.  It was a really small group where it was like taking photos with friends.  He gave instructions and let people take photos at their own pace.  The best part was learning to blend photos in Photoshop and Lightroom.  His knowledge of astrophotography is exceptional and he provided tons of insight into taking photos at night.  I want to take more night photos after working with Ollie.  I highly recommend you take a workshop with him and hope to work with him again.  Don’t think about it, just sign up and do it!