Large populations have in the past migrated from the UK to other countries, for example, from Scotland during the 18th and 19th-century Highland clearances to Canada, New Zealand and Australia and from Ireland to the USA during the potato famine of the 19th century.
Many migrated to the UK from the Indian Subcontinent and the Caribbean during the 1960s and 70s where there was a labour shortage, for example, to build motorways and houses - immigration was encouraged.
The term 'expatriate' is used in the UK to describe someone who lives abroad usually for a long, often indefinite, period. It may be for work, retirement or to be closer to relatives. If working abroad on an assignment it may be for a set period.
However, in many countries, including the UK, those coming from abroad to work in a similar capacity are commonly, and contradictorily, called 'migrants' until and if they get UK citizenship.
There is no specific time abroad that makes someone become an 'expatriate' but they are usually only granted temporary residence and will remain under the auspices of their home country embassies or consulates unless they change eventually their nationality to that of their new country of residence.
Permits or Visas regulate the length of stay for someone moving to a new country in this manner. In contrast, an asylum seeker is someone who enters a foreign country for a variety for reasons without a visa or work permit (see lesson 7) and then applies for immigrant status under the rules of that country
Organisations will usually, but not always, assume a duty of care to the individual and family members while abroad but may not, for example, be able to advise on the availability of local medical facilities.
Families may move for the employment of just one partner and as a result the roles of the entire family change. For example, a husband or wife may give up paid work and the children move into a very different education system.
These issues can lead to family tensions but if considered carefully in advance this can prevent or alleviate ongoing problems
Schooling is sometimes arranged for older children in their home country with visits to their parents during school holidays if good schooling is not available locally.
Preparation and health considerations for long or undefined periods abroad can be complex, particularly when whole families are involved.
Whenever possible, ample time should be allowed and preparation not rushed. All the issues described other courses 2-10 apply.
A brief visit to the proposed destination in advance can help reduce the fear of the unknown, although this is not always possible. If contact with other expatriates is made in advance, this can then be invaluable during the 'settling in' phase.
Finding out some details about local conditions and medical facilities can be reassuring and affect health preparations.
Facilities for pregnancy and schooling for children need consideration as well as childcare provision.
There are charitable organisations such as HealthLink360 that specialise in giving general health advice for travellers and also psychological support.
Learning some of the local languages helps integration with the local community. However unless their work role demands this, many expatriates socialising mainly together, sharing experiences, pleasures, difficulties and giving mutual support.
Accepting and preparing unfamiliar foods can be challenging as well as bartering over food prices in a market. 'Kitchen basics' in the past, such as continual hot water, a reliable cooker, washing machine and refrigerator may be difficult or expensive to obtain in remoter, often rural, areas.
In poorly resourced countries adjusting to poverty with compassion but without distress and disabling frustration can be challenging.
For more on cultural adaptation and 'culture shock' see course 3 (adapting to environmental and cultural change) and course 8 (Travellers health issues after return to their home country)
Keeping in touch with friends and relatives overseas is now much simpler with phone calls, texts, tweets, facebook, emails, real-time video conversations - very different from 100 years ago!
So-called 'reverse culture shock' can be a serious and unexpected challenge when an assignment ends or when those who have settled into their new surroundings and adjusted to the local culture decide for various reasons, often children's secondary education, to return to their home country.
Readjusting can be as demanding as it was on the outward journey, both for adults and children, through losing contact with friends made overseas, rekindling relationships at home and finding new jobs.
See also ThirdCulture Kids website
If expatriates have been in so-called 'less developed' countries, they often come back with a very different perspective on what is important in life compared to the 'consumer society' in their countries of origin where money and possessions are considered as status symbols.