Well the day arrived when I needed a download manager to handle tricky downloads so here we are. After some trial and error uget which is in the standard repositories turns out to be a good gui based download manager. It can be integrated into Firefox with the FlashGot extension.
I also had to install Archive Manager (file-roller) to extract the downloads.
I have been busy again downloading truckloads of aerial photos from Koordinates to use with maps and the download manager has been needed as the downloads kept stalling and timing out. It seems this is an issue with the new Koordinates website although they are trying to blame Linz for the issue. When I looked at uget it took 5 retries to complete some of the 10 downloads I have done in the last day. They varied in size from 1 to 5.5 GB.