Aerodrome to inbound flight - "What type of service do you require?"
Flight - "A toilet service and some fuel"
The answer is a perfectly reasonable response to the question posed.
If on the other hand, ATC ask what type of flight information service is required then it is clear what the controller is seeking an answer to. It also gives a very big hint to the pilot that there are different services provided under the Flight Information Service heading in the UK.
Regards,
DFC