How Much!!

My clothes seem to be shrinking in the wash, this is affecting trousers in particular. They seem to have gotten awfully tight of late. I had to admit defeat and weigh myself this morning, a whooping 13st 11lbs. This wouldn't be too bad if I was 6ft tall, but I'm only 5ft 7 and the ideal weight for that height is about 11st 7.

Ok There is a lot of debate about what "Ideal" actually means but being 2 st over the ideal is not the best of ideas.

A bit of history about me

About 9 years ago I weighed the best part of 15 stone, yes thats 15 stone! I struggled to get into a pair of size 36 in waist trousers. I actually resorted to buting a pair of 38" once. At this point I said no more.
I started reducing the amount I ate, walked a couple of stops to catch the bus, started cycling to work and weight came pouring off me. I was sent to work somewhere that meant I had to stay in a hotel for 10 weeks. It was at this point that I decided to start running, just a mile or 2 in the morning, but I was determined not to put the weight back on.
I then changed jobs cycled to work and ran most lunchtimes with a very competitive running partner I even managed to crack sub 40 for a 10K and was able to fit comfortable into a size 32 trousers.
Now I drive to work, haven't run in over 2 weeks and need to buy some size 36" trousers. I need to fight the fight again but I'm 9 years older and I currently don't have the same mental strength as I had then. This is going to be tough