A claim to be heard at county Court level can be made to any County Court "unless any enactment, rule or practice direction provides otherwise".
[Civil Procedure Rules, Practice Direction 7A, Section 2.4A(1)]
If a claim is inadvertently made to a County Court which is not permitted to deal with the matter it must automatically be forwarded to the relevant court anyway: "If a claim which is required to be made at a particular County Court hearing centre is made at the wrong hearing centre, a court officer will send the claim to the correct hearing centre before it is issued"
[ibid, s2.4(2)]