Originally Posted by
darren-b
As others have already said you can't just switch from a tourist visa to a work permit. If you find an employer willing to sponsor you for a work permit you would have to leave the UK and then come back when (or if..) your work permit was approved.
WHM is not an option if you are Filipino (which I'm presuming you are).
The other possible option is highly skilled worker (Tier 1 General) assuming you meet the requirements in terms of qualifications, current earnings, savings, etc.