The UK phone number plan allocates the prefix 09… (or +44 9…) to premium rate numbers[1]. A change to an 09 number should be a red flag for the edit — I'd expect very, very few businesses to use a premium rate number as their main contact number. In fact, it seems many categories of business are banned from using them [2].

Some other European countries have similar prefix-based number allocation systems.

[1] https://en.wikipedia.org/wiki/Telephone_numbers_in_the_Unite...

[2] http://www.fairtelecoms.org.uk/service-numbers-084-087-09-an...