Mr Dykes, aged 54, chairman of the European Movement and a prominent critic of his party's anti-Maastricht rebels, faces a motion to deselect him at his constituency party's executive council meeting on Wednesday.
Businessman Cyril Daniels, a vice-chairman of the party association, will lead the deselection move. 'It is going to be a rough meeting, he said.
Mr Dykes, who has represented Harrow East since 1970 and has a 11,098 majority, said last night: 'I am a very hard- working MP and I support them loyally and I expect the same thing back from them.'
Mr Dykes once urged the Prime Minister to 'see off the rebels once and for all'.
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