Birmingham New Street Signal Box
Birmingham New Street’s iconic Signal Box. Built as part of the West Coast Main Line route in 1964, listed in 1995, now decommissioned. At least it’s survived the demolition squad, though there is chatter about finding a new use for it (seriously hope it doesn’t become an inaccessibly priced boutique hotel).
You could look upon it as something of a survivor, as so many of Birmingham’s brutalist buildings have disappeared.