Boys have protested their schools' "no shorts" policy by wearing dresses to classes during the heatwave.
Several schools, including Ysgol Bro Dinefwr in Llandeilo, Carmarthenshire, doubled down on their rule despite the scorching 30C temperatures the UK has experienced this week - conditions hotter than Benidorm.
The secondary school, which caters for more than 1,100 pupils, insists black trousers are always appropriate.
