I spent some time worring about those last 5kg, then it became to exhausting and I decided that my body had just found it's balance.
I was only chasing an arbitry figure anyway, my BMI is on the low side of acceptable so losing any more would just be silly, I would probably end up more prone to injury and illness than I would by just being happy with a bit of extra insulation for winter
Sometimes we need to let go and be happy the way we are, having lost a bit already I am sure you can look back to last year and be quite pleased to have reached the stage you are at now (get out an old pair of fat pants to remind yourself)
However! If you are deadset on dropping some more and it is bothering you do this
A) don't be ruled by the scales or a specific figure, it will drive you crazy
B) treat junk food like a treat, it's not evil and perfectly ok to indulge, but save it for after a big day, like a long run, not on a rest day and be moderate in how much you eat. Don't have packets of chips and biscuits in the house, if you are having a treat just buy a single item, like an ice cream cone, rather than a tub of ice cream, that will save you from scoffing too much.
C) have a look at changing your training to increase the intensity. If you are not doing a weekly speed session then after a year it's a good time to add one. It would be great if you could join a club or running group to do these with. If you are already doing a weekly speed session then add a weekly tempo run or fartlek session to the program. For example instead of a steady 40 minute run add 15 to 20 minutes of faster paced running in the middle, or 6 to 8 bursts of 1 minute of speed before relaxing again. This sort of session will take an ordinary 40 minute run and really give you metabolism a boost but without taking any more time out of your day.
D) on your non running days consider adding a cross training session, if you belong to a gym try a spin class or something, even a swim. If you don't belong to a gym try a bike ride or even a nice brisk walk in your lunch break, it all helps.
A long post, but I hope something helped.
"There is a crack, a crack in everything. It's how the light gets in." ~ Leonard Cohen