Hello! In Scenario 2G23 : Hastings - Brighton (via Eastbourne), it is not possible to get a gold medal on the East Coast: Brighton - Eastbourne & Seaford route. The fact is that at the very beginning of the scenario, being at Eastbourne station after boarding passengers, you have a red light on. You are standing and waiting for another train to pass in front of you and you will be given the right to travel "yellow lights up". Thus, you start to lag behind the schedule by 3-4 minutes and, accordingly, get fewer game points. Even with perfect stops and without violations, you will not score 10650 points for a gold medal, since you get fewer points for being late due to traffic lights.
If you really need the gold, try spawning at Eastbourne at 11.30 and take over the Brighton train then. You should be allowed out in front of the other train which was delaying you.
Done, now it's your turn. You really need every single +30 AP for driving under speed limit. Try to be at Lewes at 12:03, then you'll be back on time at Falmer. The points are just barely enough but it's possible, I even missed Moulsecoomb by 11 yards and lost 14 points.