I'm from Harlow and to be honest mate I wouldn't worry about parking your car at the train station. Whenever I have been down there I have seen an R8 parked daily, Porsches, and a good few £60plus cars.
I have been so tempted at times to leave a note under windscreens saying "what do you do and how can I do it?" And leave my number lol
Honestly wouldn't worry tbh