Martin Weale and Ian McCafferty, widely seen as the committee's two most hawkish members, are viewed as the two most likely to want to raise rates. There are a couple of other members who are outside bets to take the leap.
David Miles, for whom the August meeting will be his last on the MPC, might also surprise with a vote to raise rates, according to Samuel Tombs, senior U.K. economist at Capital Economics. He thinks the bank will probably keep rates on hold until the second quarter of 2016.
Kristin Forbes, the U.S. economist who is the newest member of the committee, could also be an outlier who votes in favour of a rate hike, David Tinsley, U.K. and European economist at UBS, told CNBC.
"A third member voting to raise rates would be big news and certainly surprise the market," he pointed out.