I must go back to the Shuttleworth Collection sometime. I recall they have an SE5a. I presume that's leather trim around the cockpit to ensure the pilot doesn't damage the fabric rather than for his comfort?
As you have that Haynes Manual (good call that must look out for one) is that a magneto switch beside the exhaust ? Bit warm ...
Excellent photos Tim. We lived about 10-15 minutes from the Shuttleworth collection for years and spent a lot of time there both privately and in connection with other activities. Pootling over on with a picnic a summers evening in whatever classic car or something we had at the time in order to lap up one of their late WW1 aircraft was almost ethereal. Far more relaxed than Duxford. Spent so much time in both places with veterans long passed I don't really get the urge to return that often now.
The venue itself is very special, not too big nor overly commercial. Their displays are very true to those of the past, it still feels personal. I've seen some of the best display flying there.