Complex sentence: Coastal Shipping Publications is a publishing company based in Portishead, a coastal town North Somerset that publishes specialised books and magazines about coastal ships, maritime, 20th century merchant shipping and occasionally buses and trains.
Split into simpler sentences: Coastal Shipping Publications is a publishing company based in Portishead, a coastal town North Somerset. The company publishes specialised books and magazines about coastal shipping, ships, 20th century merchant shipping and occasionally buses and trains.