Question: When was a free-travel area created between Ireland and the country where the performer of Never in a Million Years is a citizen?

<P0-S0> Cara Elizabeth Dillon (born 21 July 1975, Dungiven, County Londonderry, Northern Ireland) is an Irish folk singer. <P0-S1> In 1995, she joined the folk supergroup Equation and signed a record deal with Warners Music Group. <P0-S2> After leaving the group, she collaborated with Sam Lakeman under the name Polar Star. <P0-S3> In 2001, she released her first solo album, "Cara Dillon", which featured traditional songs and two original Dillon\Lakeman compositions. <P0-S4> The album was an unexpected hit in the folk world, with Dillon receiving four nominations at the 2002 BBC Radio 2 Folk Awards. <SEP> <P1-S0> the demographics of the british isles today are characterised by a generally high density of population in england, which accounts for almost 80% of the total population of the islands. <P1-S1> in elsewhere on great britain and on ireland, high density of population is limited to areas around, or close to, a few large cities. <P1-S2> the largest urban area by far is the greater london urban area with 9 million inhabitants. <P1-S3> other major populations centres include greater manchester urban area (2.4 million), west midlands conurbation (2.4 million), west yorkshire urban area (1.6 million) in england, greater glasgow (1.2 million) in scotland and greater dublin area (1.1 million) in ireland. <P1-S4> [citation needed] <SEP> <P2-S0> northern ireland was created in 1921, when ireland was partitioned between northern ireland and southern ireland by the government of ireland act 1920. unlike southern ireland, which would become the irish free state in 1922, the majority of northern ireland's population were unionists, who wanted to remain within the united kingdom. <P2-S1> most of these were the protestant descendants of colonists from great britain. <P2-S2> however, a significant minority, mostly catholics, were nationalists who wanted a united ireland independent of british rule. <P2-S3> today, the former generally see themselves as british and the latter generally see themselves as irish, while a distinct northern irish or ulster identity is claimed both by a large minority of catholics and protestants and by many of those who are non-aligned. <SEP> <P3-S0> Ireland and the United Kingdom are both part of the European Union (EU). <P3-S1> The Crown Dependencies are not a part of the EU however do participate in certain aspects that were negotiated as a part of the UK's accession to the EU. <P3-S2> Neither the United Kingdom or Ireland are part of the Schengen area, that allow passport-free travel between EU members states. <P3-S3> However, since the partition of Ireland, an informal free-travel area had existed across the region. <P3-S4> In 1997, this area required formal recognition during the course of negotiations for the Amsterdam Treaty of the European Union and is now known as the Common Travel Area. <SEP> <P4-S0> "Never In A Million Years" is the lead single release from After The Morning, the third album by Cara Dillon. <P4-S1> The single was released as a promo for radio stations in the UK and Ireland. <P4-S2> The single was also released exclusively by iTunes as a digital download a week prior to the release of "After the Morning", where it climbed to #39 in the iTunes Top 100.