sentences:  Following the failure to win major contracts in Australia in 1960 and the subsequent failure of Highgate Wood, it was necessary for the British manufacturers to come up with something different until a fully digital system could be developed (this eventually turned out to be System X and System Y).Ericsson had twenty years of experience of manufacturing the crossbar system and reducing its cost, so there was no point in trying to compete with them (Plessey Telecommunications, a subsidiary of Plessey, took a different view and continued to urge the GPO to adopt crossbar).At this time, in the US, Bell Labs were developing a system based on electronically controlled reed relays, and this looked promising.