* Cable hits 1.3815 after building on early London gains
* 1.3815 is the highest level since Sept 16 (1.3811 was Sept 17 high)
* Global equity gains are positive for the risk-sensitive pound
* BoE rate rise from 0.1% expected on Nov 4
* Offers may emerge near 1.3850 if GBP/USD extends north: 1.3848
* 1.3852 was Sept 15/16 high. 1.3765 (Monday's high) is now a support point
(Robert Howard is a Reuters market analyst. The views expressed are his own) ((robert.howard@thomsonreuters.com))