Coleen Rooney didn’t let the ‘extreme heat’ warning get in the way of her daily workout on Thursday as she headed to the gym in Cheshire. The WAG, 40, looked in good spirits as Britain faces one of its hottest days on record as temperatures could hit 38C (100F). But Coleen didn’t let the heatwave stop her as she enjoyed a morning workout and kept cool in a black tank top which she teamed with matching leggings. The I’m A Celebrity star ditched her trainers for a pair of pink flip flops and kept hydrated with a large water bottle and picked up a coffee. Coleen pulled her brunette tresses back in a low ponytail and shielded from the sun under a pair of large sunglasses. Never one to keep things low-key, she paired her look with her large diamond earrings and her delicate name necklace while adding in a smart watch. The mother-of-four was spotted heading back to her car as she carried her keys, phone and water bottle. Coleen Rooney didn’t let the ‘extreme heat’ warning get in the way of her daily workout on Thursday as she headed to the gym in Cheshire The WAG, 40, looked in good spirits as Britain faces one of its hottest days on record as temperatures could hit 38CThe Met Office has extended the area of its rare 15-hour amber ‘extreme heat’ warning – only its second since 2022 – which came into force at 9am this morning.The warning initially covered parts of central and southern England, but at 10am it was extended further west – where the highest temperatures are now expected.The whole of England is separately under a UK Health Security Agency amber heat health alert until tomorrow night, which warns of a ‘rise in deaths’.A 38C (100F) high today would make it Britain’s joint fifth hottest day on record – tying with that same temperature in Norfolk on June 26, which is the current 2026 high.It comes as fire chiefs said 1,017 wildfires have been recorded in England and Wales so far in 2026, the same as the record-breaking total for the whole of last year.Her workout comes after Coleen dropped her second collection with Primark after signing a multi-million pound deal earlier this year.The WAG’s son Cass made his modelling debut at the age of eight as he joined his glamorous mother in her new Primark campaign.The TV personality shared her delight, calling the photoshoot with her youngest child a ‘special moment’.Coleen and her football pundit husband, Wayne, 40, are parents to three other children, sons Kai, 16; Klay, 12, and Kit, 10.It marks her second By Coleen collection since signing a multi-million pound deal with the high-street retailer earlier this year. But Coleen didn’t let the heatwave stop her and she enjoyed a morning workout and kept cool in a black tank top which she teamed with matching leggings The I’m A Celebrity star ditched her trainers for a pair of pink flip flops and kept hydrated with a large water bottle and picked up a coffee Never one to keep things low-key, she paired her look with her large diamond earrings and her delicate name necklace while adding in a smart watchColeen looked incredible in a checked jacket, before slipping into a black leather-look bomber jacket in a second shot.Cass sported a pale green jumper and off-white jogging bottoms as he posed in his first ever professional photoshoot.Coleen said proudly: ‘As a mum to four children, I wanted the collection to feel stylish yet practical, and working with a brand like Primark that so many of my followers shop with was really important to me.’My friends all loved the first By Coleen collection, so I can’t wait for them to see the next one. My family are very proud of me with this collaboration, and having Cass as part of the kids wear photoshoot was such a special moment.’I’m over the moon for how it’s all turned out and I absolutely loved seeing everyone tagging me in their posts with the last collection, so am hoping it’s much the same this time round!’By Coleen launched in Primark stores on Tuesday, with womenswear priced at £2.50 to £30; the kidswear launches in August, with prices starting at £7.In Great Britain, customers will also be able to shop the full collection via Click & Collect.