I remember the first time we went through this in 1974 on the way to Cornwall in my Dad's "new" '72 cortina Mk3, me in the front with the road map on my lap and my Mum and younger Sister and Brother in the back. It took us several circuits of the complex to get through as "the signs were wrong" according to my Dad. Yeah, right! We'd been past it 3 years earlier while it was under construction which meant queueing through Birmingham, an even bigger nightmare! https://www.bbc.co.uk/news/uk-england-birmingham-61482844