Thanks - Steve - I worked in Maldon too during the 90s. There is quite a good dark field site on the coast near the 1st century church there.
I stretched the image with Masked Stretch at first, and some subtle LHE. I then tried out the new Exponential Stretch to enhance the neb before some sharpening to the first four wavelet layers. The star color was developed in a second RGB image, which had the L component of the Nebula applied to it. I then used a star mask over the nebula and copied in the RGB image, effectively changing over the color. I made the star mask from the star image, with the residual layer disabled.