In May Lachlan returned to the shipyard in Rosyth where he has been painting regularly for the last couple of years. He has been asked to document the construction of the Royal Navy's new flagships; the 65,000 tonne HMS Queen Elizabeth and HMS Prince of Wales.
Lachlan writes: "It's an incredible project which will keep me busy for several years. The scale can be quite overwhelming and the technical challenge of compressing so much activity onto one sheet of paper or canvas can be pretty tricky!
I'm enjoying the process and looking forward to turning many of my sketches into larger paintings in the studio."
Here is some of the striking work he is doing as part of the project.