I will use 'DaFont.com' in order to find my typographies as this is a site that makes it easy to find and download multiple different fonts in order top find the most appropriate one.
The first typography I will look at will be for my E4 poster.
To set a bench mark of what my typography will have to look like, I will look at the one that has been used for "Noel Fielding's Luxury Comedy". After looking at 'DaFont.com' I found the typography Sanchez which I think is similar to the one that E4 uses and I will use this one on my poster (http://www.dafont.com/sanchez.font)
The typography that I will use on my Channel 4 poster is one that is already a default typography that is already saved on Photoshop so I will not have to down load it onto a computer. The one that I have found to create it would be Calibri.