HI - don't forget that as a runner/serious exerciser you will be heavier but size slimmer than most women - the 'weight/height' charts don't take muscle into account.
And now - just a personal query - is losing 5 kg really worth losing 5 glasses of wine a week (which for me is about total enjoyment - kids in bed, beer in hand relaxation)? Personally I would rather shoot myself now than contemplate losing those little extra treats!
My suggestion would be to look at your portion sizes which you suggest are big(if you are still determined to lose the 'extra') If for instance, you have 1/2 complex carbs such as pasta, 1/4 meat, 1/4 green veg, change the proportions so that the complex carbs and green veg swap over - this is classic 'low GI' diet principal and helped me to drop the last stone post kids. It has stayed off and I'm just eating more fruit and veg and less bread etc now with no lost enjoyment and less post lunch sleepiness! Good luck