Firefighters tackle hundreds of deliberately-set grass fires across South Wales

Firefighters tackle hundreds of deliberately-set grass fires across South Wales; WALES: EXT Smoke and flames rising from grass fire on mountainside Fire blazing at Rhondda Valleys Smoke rising from hillside Firefighter hosing water at fire (seen through hazy smoke) Wide shot of firefighters fighting fire on mountain Firefighter battling fire Gorse bush on fire Firefighters chatting as fire rages in background SOT - It's gone into the other valley now, it's jumped it Fire raging on mountainside Reporter to camera Firefighter (looking exhausted) with fire raging in background Houses with fire on mountain in background Man sitting on wall holding hose pipe Close shot man holding hose pipe with fire on mountain in background Mike Davies (Local resident) interview SOT Helicopter dropping water over fire Helicopter dropping water over fire Smoke blowing across blackened ground (from previous fire) Various shots of smoke and flames rising