Englishal - I didn't understand the above?
On the plan it looked like you were trying to avoid the fillet of LTMA which is 2500+ and remaining in the TMA that is 3500+ by dog legging around the 2500+ bit. I'd just plan to route directly to Earls Colne under the 2500+ fillet is what I was trying to say. As you'll be landing at Earls Colne, then presumably you will be descending down at some stage so you might as well route direct....That is what I would do anyway if coming from the Chelmsford direction.