I started double training days in October and found them tough to start with, mentally as much as physically because I didn't always fancy putting my running shoes on again in the evening. But after several weeks I seemed to benefit, and after five I set a new half marathon PB, and then a new marathon PB after 12 weeks. It might just have been the extra mileage, of course, but it's worth giving them a go. I'm not a morning person so I do a slow morning jog after coffee then a harder session in the evening.
Hello Paul, yes, always fun down in Portsmouth just before Xmas. That event does a great job of keeping everyone training to the end of the year. I was close to you actually. I reckon most 'other halves' of us amateur athletes are also our coaches. Good luck with the next few runs!