Britain's dominant services sector has expanded more than expected but a separate survey suggested economic growth may have cooled towards the end of the second quarter of the year.
Britain's dominant services sector grew more than expected last month, bouncing back from pre-election uncertainty in May.
The London market was lower as anxious traders looked towards Greece's referendum over its eurozone bailout on Sunday.
Britain's builders have enjoyed a post-election bounce back as the construction sector grew at its fastest pace since February, according to new figures.
Britain's manufacturing sector grew at its slowest pace in more than two years last month, impacted by subdued demand from Europe.