Sorry PeterPANOP, looks like everyone so far has misunderstood your question.
ILS classification has recently been thrown into the spotlight as a result of the introduction of Lower than CAT l and Other Than CAT ll approach operations.
In the UK there are some installations that can't meet integrity targets and so need to be upgraded. Somewhere on the web will be the requirements. At any airport with an ILS there should be a person nominated as responsible for NAVAIDs. In the UK they are known as SATE.
As far as I know up till recently the type of classification you refer to has not been something operators have not had to take account of.
Suggest talking to NATS at Swannick - there should be an engineering dept to help you.
SGC