(Reuters) - Britons became more worried about their finances in April as they took home less pay, saw their debts mount and expected living costs to rise over the next year but they felt more upbeat about their job security, a survey showed on Monday.

Markit's headline Household Finance Index fell to 37.0 in April, its lowest level in three months, down from 37.8 in March and remaining well below the 50 level which would mark an improvement in Britons' finances.

The decline in the index points to the fragility of consumer morale in Britain less than a week after the Bank of England signalled it would not inject more monetary stimulus into the economy as it fears inflation will now be greater than expected.

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