In proceedings concerning a contract concluded by a person for a purpose which can be regarded as being outside his trade or profession, hereinafter called “the consumer", jurisdiction shall be determined by this Section, without prejudice to the provisions of Articles . . .5(5)and (8)(b), if it is:
a contract for the sale of goods on instalment credit terms or
a contract for a loan repayable by instalments, or for any other form of credit, made to finance the sale of goods, or
any other contract for the supply of goods or a contract for the supply of services and . . .the consumer took inthe part of the United Kingdom in which he is domiciledthe steps necessary for the conclusion of the contract.
. . .
This Section shall not apply to contracts of transportor insurance.
A consumer may bring proceedings against the other party to a contract either in the courts of thepart of the United Kingdomin which that party is domiciled or in the courts of thepart of the United Kingdomin which he is himself domiciled.
Proceedings may be brought against a consumer by the other party to the contract only in the courts of thepart of the United Kingdom in which the consumer is domiciled.
These provisions shall not affect the right to bring a counterclaim in the court in which, in accordance with this Section, the original claim is pending.
The provisions of this Section may be departed from only by an agreement:
which is entered into after the dispute has arisen, or
which allows the consumer to bring proceedings in courts other than those indicated in this Section, or
which is entered into by the consumer and the other party to the contract, both of whom are at the time of conclusion of the contract domiciled or habitually resident in the samepart of the United Kingdom, and which confers jurisdiction on the courts of thatpart, provided that such an agreement is not contrary to the law of thatpart.