Parkinality columnist Julie Walker, of Bishop’s Stortford, writes not about parking, but about living with Parkinson’s disease in her 50s I feel I have a certain amount of responsibility when writing this column. A responsibility to raise awareness. A responsibility to inform and to be honest. There are three words I don’t think I have used in the same sentence – I am struggling. There, I said it. I don’t often write about it because I don’t want to worry friends and family. Or, come to think of it, myself. Somehow writing it down makes it real. I am not medically trained, nor am I a mental he…