内容摘要：The register is a list of people who can prove they came to Assam by 24 March 1971, the day before neighbouring Bangladesh declared independence from Pakistan. The list went through several iterations, with people whose names were missing given chances to prove their Indian citizenship by showing official documents to quasi-judicial forums called Foreigners Tribunals.

The register is a list of people who can prove they came to Assam by 24 March 1971, the day before neighbouring Bangladesh declared independence from Pakistan. The list went through several iterations, with people whose names were missing given chances to prove their Indian citizenship by showing official documents to quasi-judicial forums called Foreigners Tribunals.

A further four special stamps show marine timekeepers, as pioneered by clockmaker John Harrison.The Royal Observatory was founded by King Charles II in 1675 and is described by Royal Museums Greenwich as Britain's oldest purpose-built scientific institution.

The observatory was founded to provide better star charts to help navigation for global trade.Its Astronomers Royal - the first of whom was John Flamsteed - observed the stars and developed new instruments such as the Airy Transit Circle and Great Equatorial Telescope.Royal Navy surveyors plotted their longitude from Greenwich using chronometers based on horologist Harrison's timekeepers, and the widespread use by ships worldwide of charts based on the Greenwich meridian led to the international recognition of Greenwich as the prime meridian of the world in 1884.

The stamps are available to pre-order from Thursday and go on general sale from 12 June.A town's museum has had to close temporarily due to a lack of volunteers.

Chatteris Museum in Cambridgeshire, which is usually open for three days a week, is desperate to attract more volunteers – particularly those who can work front of house.

The museum has 23 volunteers, but not all of them want to work as "meet and greeters".In a statement, the Border Guard Bangladesh said it had increased patrolling along the border to curb these attempts.

India has not commented on these allegations.While media reports indicate that the recent crackdown includes Rohingya Muslims living in other states too, the situation is particularly tense and complex in Assam, where issues of citizenship and ethnic identity have long dominated politics.

The state, which shares a nearly 300km-long border with Muslim-majority Bangladesh, has seen waves of migration from the neighbouring country as people moved in search of opportunities or fled religious persecution.This has sparked the anxieties of Assamese people, many of whom fear this is bringing in demographic change and taking away resources from locals.