It did not take long for Google to allow it back. SEOs predicted that it would return at some point, but it is surprising to see it come back so soon.
This suggests that the ban could have been due to news sites not adding nofollow in error, i.e. no fault of Interflora, or the links from their network of franchise websites, which appear to have been removed (need to double check that) may now no longer be passing PageRank.
Or something else. Whatever, it is good to see them back.
Not only are they back for a search on “Interflora”, but also on page 1 for one of their keywords, “flowers online”.