What is the best way to tidy outdoor items around block paving?
Pretty common to just use a matching silicone sealant around the cables, brown or black in this case. If using plastic covers, you'd probably have to buy two and cut them down to meet in the middle.

The drain pipe needs some mortar with a drop of red cement colouring (a powder usually) mixed into it. Wrap a piece of polythene around the pipe first and carefully slide/twist it out after 2 or 3 hours (before it sets really hard). 

Alternatively, fill around the pipe with a small decorative gravel, although sweeping may pull this out over time.