GEC Plc’s Marconi Instruments Ltd is strengthening its position in the microwave test and measurement market via a marketing alliance with EIP Microwave Inc: from December 1, Marconi will assume responsibility for worldwide sales and support activities for EIP products in most countries outside North America; Marcon reckons that the combined sales of the two groups will together make them the fourth largest in the market, which is led by Hewlett-Packard Co; Marconi Instruments says that it is also planning to increase its sales to South East Asia with the opening of a regional sales, technical support and service facility in Singapore.