Boeing 737 and Lockheed Electra

I am trying to find out some information for a project.

Can anyone give us some idea of flying rates charged out in the United Kingdom per hour for a Boeing 737 300 Freighter and the Lockheed Electra.

This is flying time rates only, if any one can give some rough ideas on what they are I would be greatful.

I am not expecting it to be to the nearest penny, just to get some idea of the rates charged.

Many thanks