Mike Trees:

"The half marathon is a distance I have been doing regularly for over 40 years now. I ran a personal best of 1hr 6 mins in my 30s.
It is often seen as a stepping stone for the marathon, but I believe it is a very different event. It is possible to do a good HM with much shorter runs than the marathon, and nutrition does not play such a large part. 
However, don’t be fooled,  the HM is still a tough event. You will need to prepare well, particularly for the last 5km to maintain your pace. Follow these schedules to get the right balance between speed and endurance and on race day you will smash your personal targets."

Tommy Trees
"The half marathon is a really fun event to do! I’ve always thought it had the perfect balance between speed and endurance.
I started racing these at a very early age and managed to do a time of 1hr 20 at 14 years old. More recently, I ran a PB of 1hr 16 following this programme, so I know it works. "