ANKARA AGREEMENT(ANKARA ANTLASMASI)
Turkey first applied for associate membership of the EEC in July 1959, shortly following the EEC's creation in 1958. The EEC responded by suggesting the establishment of an association as an interim measure leading to full accession. This led to negotiations which resulted in the Ankara Agreement on September 12, 1963.

The Ankara Agreement was signed on September 12, 1963 at Ankara.
The United Kingdom Border Agency has announced that it has opened a visa route for Turkish nationals applying to establish themselves in business under the European Community Association Agreement (ECAA).

The decision follows - albeit two years afterwards - the European Court of Justice's decision in Veli Tum and Mehmet Dari v Secretary of State for the Home Department (Case no 16/05) (20-9-2007). In that case the European Court of Justice (ECJ) held that:

"the 'standstill' clause set out in Article 41(1) of the Additional Protocol must be regarded as also applicable to rules relating to the first admission of Turkish nationals into a Member State in whose territory they intend to exercise their freedom of establishment under the Association Agreement."

Article 13 of that agreement referred to the contracting parties (Turkey and the nations who at that time comprised the European Community) agreement to be bound by the relevant articles of the Treaty establishing the European Community for the purposes of abolishing restrictions on the freedom of establishment between them. What later caused the controversy surrounding the Tum and Dari case was Article 41 of the Additional Protocol to the Ankara Agreement - which provides that Member States shall:
"Refrain from introducing new restrictions on the freedom of establishment and freedom to provide services"

- for Turkish nationals from the date the ECAA and the Additional Protocol came into force for the Member State concerned. So when the UK joined what was then called the European Economic Community (EEC) in 1973 it became bound not to impose any more stringent requirements than those required to be met by people wishing to establish themselves in business in the UK under the 1973 Immigration Rules. This is the "standstill clause" referred to in the ECJ's ruling.
GENERAL TIER 1
This category allows highly skilled people to look for work or self-employments opportunities in the United Kingdom.

To apply under the General Tier 1 you must score 75/80 points for your attributes (age, qualifications, earnings and experience in the UK), 10 points for English Language and 10 points for available maintenance.

You can apply to extend your stay in the UK under Tier 1 if you are already here:
TIER 2(FORMERLY AS KNOWN WORK PERMIT)
Tier 2 General is for people coming to the United Kingdom with a skilled job offer. All applicants must ensure that they have a sponsor and a valid certificate of sponsorship. Tier 2 point based system was launched in full from 27th November 2008.

In order for an employer to sponsor a foreign worker, the employer must have an Employer Sponsorship Licence.

Skilled Workers: the Tier 2 skilled worker category is for people with a specific skilled job offer in the UK who are needed to fill a temporary gab in the labour force.
Intra Company Transfer: The intra company transfer category is for people who are transferred to UK Branch of their Organisation.
Sports People: the sports people category is for elite professional athletes and coaches
Minister Religion: the minister of religion category is for workers within a bona fide religion.
TIER 4
Tier 4 is part of the point based system for immigration. It is for migrants who wants to study in the UK. There are two student categories in Tier 4 of the points based system.

General Student: for students coming to the United Kingdom for post-16 education
Child Student: for children between 4-17 years old to come to the United Kingdom for their education. Children between 4 and 15 years old may only be educated at independent fee paying schools.

All students making a Tier 4 application will have to submit his/her biometric details. An application can only be assessed once these are received.

Students must meet the full requirements of the Immigration rules and have 40 points in total.