Seven in 10 assumed that Northern Ireland counted as part of Great Britain.Strikingly, a century after the Easter Rising, one in seven Britons surveyed thought the Republic of Ireland is still part of the UK.Researchers surveyed 2,000 people as part of preparations for Ordnance Survey’s National Map Reading Week initiative next month.It comes amid fears that dependence on satnav and mobile phones are destroying people’s ability to read a basic map.Overall 86 per cent of respondents thought they had a reasonable sense of direction, with more than half describing their knowledge of geographical locations in Britain as good or excellent.But only 14 per cent correctly located Edinburgh on a map, with only 15 per cent managing to mark Birmingham correctly and just 22 per cent pinpointing Manchester. A long way from Scotland: the Scilly IslesCredit:Alamy When asked to locate the Isles of Scilly, which are found off the coast of Cornwall, almost one in 10 put them where the Isle of Man should go and another one in 20 relocated them off the western coast of Scotland.A spokesman for Ordnance Survey said: “Great Britain is relatively small, yet it seems many of us struggle to pinpoint the positions of cities and locations which may not even be that far from where we live.“Despite this, many claim to have a good sense of direction – although maybe not those who believe the Isles of Scilly are off the Scottish coast.“Many people are lacking in both the basic knowledge of where places are in Britain, and the ability to read a traditional map.“This could be due to our increasing reliance on technology like satnav and mobile devices to tell us where we are.“Map reading is an essential skill for exploring Britain safely.“While GPS devices can be really convenient, they can run into problems with battery life.“We always recommend carrying a paper map and compass – it could be a life-saver.” Even the capital city left many people stumped, with more than four in 10 unable to locate it correctly.Perhaps unsurprisingly in the wake of Team GB’s Olympic and Paralympic triumphs, the distinction between the UK and Great Britain – which refers only to mainland Britain – left most Britons baffled. The British might once have ruled the waves with an empire covering almost a third of the globe but nowadays, it seems, most of us do not know one end of the country from another.When a sample of the public were set a simple geography test by Ordnance Survey, only a minority were able to pinpoint major cities including Birmingham, Newcastle and Edinburgh on unlabelled map.A small but significant minority thought that the Isles of Scilly could be found off the coast of Scotland. Where is London: some respondents located it in the far north of ScotlandCredit:SWNS Many claim to have a good sense of direction – although maybe not those who believe the Isles of Scilly are off the Scottish coastOrdnance Survey spokesman Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.