Just a quick update I did not have to use ladders at all as the guttervac worked well to clear the bocked downspout and guttering in the pics below.
To put the swan neck joint back together to the downpipe I found out the downpipe was lose on the wall so had dropped down. Instead of getting me ladders of the van as I could not be arsed I just used a wfp and the end of the brush to tease the bottom opening on the downspout forward a bit to line up with the downpipe and pushed them back together.
To stop them comming apart again as the brackets were the wrong size fitted to the downpipe so would not tighten up enough I just wedged a bit of brick under the bend at the botton of the downpipe to stop it slipping down again. Jobs a good um..Yeeha!