New [BOE] governor Mark Carney has already made changes. In a statement accompanying the widely-expected decision to leave both rates and asset purchases unchanged, the BoE said that rising market rates had shifted expectations for the Bank Rate above levels that were justified by the economic situation.
The fact that there was a statement at all indicated a change in policy. The old BOE just announced its decision and left interpretation to the markets.
This was a clear attempt to talk the markets down and it worked.
Read more at Recap: Surprise as BOE, ECB Give Forward Guidance – MoneyBeat – WSJ.