Taksim_Red:
Technically she's not right. The police may advise bars not to serve stronger drinks in excessive quantities, but's that's all it is - advice. It's not law but more often than not the licencee will abide to keep police on side. Anyway Leffe blonde and brown are only about 6.5%abv so not totally excessive in strength. I love the red one too, pity they don't sell that over here.
Technically she may be right

The police can ask for the licence to be reviewed and have conditions added to the licence but these will need to be agreed by the Local authority.