It is vital to check with the airline about any restrictions or special rules regarding carrying animals onboard a flight.
You must also verify whether any health certificates, documents and/or quarantine are required in the destination country. Animals must be carried in containers (kennels) that are strong enough to withstand breaking and prevent escape.
More information can be found on these sites:
www.defra.gov.uk (Great Britain)
MINISTERO DELLA SALUTE PIF (Border Inspection Post)
CARGO CITY - F TOWER - 3° Floor
Opening hours: 08.00 - 18.00 from monday to friday and till 14.00 on Saturday.
Phonel: (+39) 06 59944794