iRule redirect from sports.test.co.uk/ioks/* to www.test.co.uk/ioks/*

The best solution is to create the new statement in the existing irule.

the Location header can contain only URI or all URL

• /ioks/ --> OK
• https://www.test2.co.uk/ioks/ --> OK

but not hostname without protocol :

• www.test2.co.uk/ioks/ --> WRONG

So the right code is (URI is added in the Location header as your question contains wildcard):

elseif {[HTTP::path] starts_with "/ioks/"} { 
    HTTP:: respond 301 Location "http://www.test2.co.uk[HTTP::uri]" 
    log local0. "This is iojs [HTTP::uri]"
}