Kiddie,

its doesnt seem to bad course wise with the qualifications etc, but you will only be a plumber, so you wont have any gas experience or qualifications so you would have to that as well, unless you wanted to be a plumber only (no gas work). £5600+vat and £250 is a hell of a lot of money for the 10 week course though, there may be some good job leads, but there may not!.

Check around to see if theres any cheaper courses.

As its been mentioned before by the others, make sure its want you want to do before you part with the £ for the course, as plumbing and heating is not as good as its made out to be, but you carn earn a decent/ish living