After a positive start the FTSE 100 has slipped into negative territory, falling almost 11 points to 6,869.59.

3i Group is the worst performer, down 3.6%, as the private equity fund is trading without entitlement to its latest dividend pay-out from Thursday.

It's followed by homebuilder Barratt, down 2.6%, private health company NMC, 2% lower, and M&S, down 1.9%.