From next Monday, 9 September, an extra Cannon Street bound train will call St Johns at 07:03, helping to fill in the current 25 minute gap in service in the early peak. I went, on behalf of the St John's Society, to the Southeastern Meet the Manager session a couple of months ago (no idea if anyone else got in touch with Southeastern too?) where I asked the MD about getting an extra service. And they've added one! Details, along with the extra Victoria-Bexleyheath evening service, on the Southeastern website.