Thanks for the quick replies.
As for the vocational training I'm referring to, it's the one-off training in techniques and work practices used in the UK that joebloggs has mentioned.
Yes, I agree on what Darren and Dondi suggested on not to reuse it for tourism re-entry but perhaps talking to our UK sponsor to arrange for a follow-up training or another business meeting or conference.
Thanks again.
Warmest regards!