THE Labour leadership has asked the Prime Minister to intervene in the

crisis facing Northern Ireland Minister Michael Mates over his

association with fugitive tycoon Asil Nadir.

With Mr Mates's political future seriously in question, Opposition

City spokesman Alistair Darling said the public was entitled to an

explanation.

MPs said the Minister should explain his gift of a watch -- inscribed

''Don't let the buggers get you down'' -- to Mr Nadir just a few days

before the bankrupt ex-Polly Peck chief jumped #3.5m bail and fled to

Turkish Northern Cyprus.

Mr Mates wrote more than once to the Attorney-General, Sir Nicholas

Lyell, about the Serious Fraud Office's handling of its inquiries into

Mr Nadir.

A lawyer acting for the businessman intervened on behalf of Mr Mates,

saying he was acting as a good MP in taking an interest in a man going

through ''a rough time''.

Mr Darling said: ''I will be writing to the Prime Minister asking him

to investigate Michael Mates's involvement with Asil Nadir. Michael

Mates is a holder of public office, being a Minister of the Crown.

''I find it surprising that he should be taking Asil Nadir's case and

doing so shortly before he disappeared from this country. The public is

entitled to know.

''There may well be an innocent explanation, but as far as we know, Mr

Nadir was not a constituent of his.''

With other MPs demanding Government action, Mr Mates was backed by

former Bar Council chairman Anthony Scrivener, QC, who was retained by

Mr Nadir to defend him on 13 charges of theft and false accounting.

Mr Scrivener said: ''The whole thing is totally ludicrous. Mr Mates

was acting as a very good MP in taking an interest in the Nadir case.

''He took an interest in Nadir when he was having a rough time. A lot

of unfair things are happening to Nadir and Mr Mates wrote letters to

the Attorney-General pointing out things that had gone on. Mr Mates has

behaved very reputably.''

He added: ''It is true that Mr Mates gave Nadir a watch. It was a bit

of a joke.

''Lots of people gave him watches after he had his own watch taken

from his wrist by solicitors in trustee in bankruptcy. It was at the

time they seized everything from his room.''

Mr Scrivener said one of Mr Mates's letters to the Attorney-General

was about the fact that the SFO refused to go to Northern Cyprus.

The SFO has said it made no inquiries in Northern Cyprus because the

self-proclaimed republic is not recognised diplomatically by Britain or

most of the rest of the world.

Mr Douglas Hoyle, chairman of the Parliamentary Labour Party, claimed

Mr Mates was ''supporting a man who has jumped bail while facing very

serious charges.

''He must explain himself or reconsider his position -- and if there

is no satisfactory outcome, then the Prime Minister should sack him.''

Mr Hoyle, MP for Warrington North, said: ''The public is entitled to

know what is happening, when a Minister acts in this way towards a man

who is on the run from British justice.''

Neath Labour MP Peter Hain said he would table Commons questions to

the Prime Minister about reports that Mr Mates was lobbying on Mr

Nadir's behalf.

''John Major should be asking why this is happening if the reports are

true, especially as Nadir has given a lot of money to the Tory Party.

Government sources said they understood Mr Mates was acting in the

matter as a constituency MP, and not as a Minister.