Copyright law prevents us using Google (or any other commercial source not specifically declared as copyright free) as evidence for mapping. We can use absence of Boots on its store locator as justification to unmap it (and I have done that now). 

It is possible, but unlikely, that KFC has moved from 253 to 257 without updating its web page and we can create a note on 257 asking "is this now KFC" on the basis of undisclosed and unattributed evidence, but we cannot and must not make any map changes unless either KFC updates its web site *or* an editor physically confirms the change.