Mave seems to have got it slightly wrong (to say the least) in her last paragraph, "Nothing has been left behind except a cable to monitor movement..." Nothing of course other than thousands of plastic bags and any Atkinson/BBC tunnel arches which were deemed too dangerous to remove. At least there's no 21st century time capsule in there (one of English Heritage's less inspired/informed ideas and supported by some who should have known better). The 1968 concrete lintel and metal door have also thankfully been removed.