Where to Advertise Developer role? Help

Hi folks

I'm going for a job interview tomorrow and have been asked to do a presentation outlining how I would find an Oracle developer with SQL, unix shell scripting and experience of data warehousing.

The theoretical role is to be based in London, England and I wondered if any of you with this experience could help me out by telling me where you would look for a job like this and what your favorite job search websites (specifically in the UK) are?

Thanks so much for your help.

Regards

Midnight