X has a long lease in a block of flats. X is abroad (unknown location), but has email addresses, though he infrequently responds to emails. X’s flat is furnished but unlet and unoccupied. X has over £10,000 of service charge arrears. X refuses to engage with the freeholder via the management company. The management company now want to take action. Given that X is the leasehold owner of the flat, can a claim be served at his flat and via email, despite knowledge he is abroad, though details of his location are unknown?