I can confirm that the unverified number of "Sadler's Wells" (0844 412 4300) is 020 7863 8000. The "other info" field could most usefully contain "Box Office".

There is an existing verified entry for "Sadlers Wells", but without the apostrophe, so it might be worth keeping to help people find it. The 0870 number is an old number no longer listed on the Sadler's Wells web page, but listed on other sites.

A search on "sadler" retrieves 6 unverified entries, with various spellings and phone numbers in the wrong fields, 5 of which could be deleted. The entry "020 7863 8198" is actually the reception/stage door number, has no 0870/0844 equivalent, is freely advertised on the web page, so might as well be deleted.

Nick