Strictly speaking, I'm in the wrong thread here as I have an ibox 2+ SE but this thread was a help to me so here is how I corrected the issue.
Having navigated my way, using Filezilla, to ...
/usr/lib/enigma2/python/Plugins/SystemPlugins/AutoBouquetsMaker/providers
I found 2 files
sat_282_sky_uk.xml
sat_282_sky_uk_zzl.xml
I copied both of these files to my desktop, opened them, used the edit/find function to locate any and all instances of the number 141. I changed all of these to 115.
Simple stuff.
Then I did the same again, this time time searching for the number 142 and whenever I found it changed it to 141.
Close the file, remembering to save on the way out. Copy the files over to your box and then grab the remote and do a scan...
menu/setup/service searching/autobouquetmarker/start scan
I now have BBC1HD, BBC2HD, ITVHD and Ch4HD at the top of my list again. I'm not too worried about any other channel movements.