Bridgwater is a large market town with a population of around 40,000 people. It is expanding and is a major centre of employment in Somerset. The Express Business Park is home to the Exel Centre for NHS Logistics, Gerber and Toolstation amongst other businesses. Argos has a regional distribution centre at Huntworth. The 600-acre commercial development campus, known as Gravity, is planned in the town to target the low-carbon economy. Bridgwater has a busy town centre, including a traditional high street and an indoor shopping centre as well as supermarkets such as Sainsburys and Aldi. As well as being close to the M5 J23 and J24, the town has a railway station on the Bristol to Taunton line, offering a service to London Paddington via Bristol Temple Meads and there is also a daily coach service to London. The town is also linked to Taunton via the canal. As well as playing host to the winter carnival, which attracts 150,000 people annually, other attractions include the Blake Museum and the Bridgwater Arts Centre, based in a Grade 1 Listed Building in Castle Street. To the north of the town are the Mendip Hills, to the west The Quantocks. The Bridgwater Bay National Nature Reserve is a SSSI and a key habitat for wildlife and nature. The town has rugby, cricket, hockey and football clubs and there is a golf course at Enmore. Bridgwater and Taunton College has some 3000 students, has links to various Universities and has made a £50 million investment in the College in the past three years. St. Marys Primary School and Haygrove Secondary School are both rated as Good by Ofsted.