The P.105 was a proposed variant of the P.74 with the 825hp Napier Oryx NOr.4 turbine generators moved above the cabin to become a universal hub for various fuselage options. Prototype planned to fly in 1958. Unbuilt.
The option shown below is the 10-seat passenger transport.
The P.106 was a flying "spider-crane" to utilize the P.105's universal power hub.
A brochure sold on eBay back in 2009 with great pictures of the P.105 and flying crane version. If anyone can find scans of these please share them.