JonC

I have spent a quiet a bit of the spring sorting my pond out, main thing was to upgrade the filter and re-route the pipework and electrics for the pump. I also added a small fountain, its a pondmate 1200 and costs £30 with a selection of fountain heads, it has a 2nd output if you want to run a waterfall, seems good so far gives a couple of feet on the fountain. The only downside is the filter built in to the fountain pump needs to be cleaned, especially if you have a wildlife friendly pond. Have also upgraded the electrics so individual bits can be switched on and off.

We had to get a cable along a 50m buried pipe, the cable was to connect a CB to a rather large aerial up the top of the garden. The solution was some fine string and a bottle of compressed air. Tie the string to a bit of foam that just about fits inside the pipe and blow it through. String is then used to pull the thicker wire through.

Inside cable routing was generally done using badly trained ferrets, it generally worked but takes ages if the bloody thing decided to have a snooze. 

You have probably already thought of this, but its a good idea to run some high vis tape above the pipe to act as a warning if some bright spark decides to dig in the wrong place.  Just seen photos, looks like you've got that sorted