My interpretation of his statement is that UK is not and does not intend to "intervene" in GBP rate and has no target 'fair' value for GBP under its current monetary policy. They probably targetting interest rate via its Gilt debt instrument, rather than exchange rate.
That essentially means that GBP will be allowed to be traded freely according to market supply and demand. It is not indicative whether GBP is going to be stronger or weaker. Market force will decide.