It is the closest station to the zone, quadrant and sector boundaries, by the usual weighted average. Therefore, if faced with boundary problems and forced to use extra faresaver points, it can be very useful to reduce these effects. Likewise, being a neutral colour, it is not affected by line reflection, colour variance or cross-hatching. Being in the upper third of zone 2, its left-handedness gives a neat spin into zone 1 which can be used to double-shunt off most stations inside the Circle line. And, of course, its interchange properties lend it a triple pegging bonus when in spoon or knip.