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I'd agree that it's likely to happen soon.
As well as OPEC agreeing on a strategy and maybe pulling the Russians in, we're coming out of refinery turnaround season which usually results in an uptick in crude demand and hence prices (mixed for products prices though as petrol/diesel etc production picks up when the refineries are back online).
Add the devaluation into that and you have refiners coming back into the market with much higher costs in GBP terms, so yes, autumn hikes seem quite likely to me.
e.g. about right now.
Let's call it a 20% currency drop and a 10% increase in oil price since the referendum. I'd say that a hike is imminent.