Thanks for all the advice π .
I spent quite a lot of time researching printers yesterday (Epson, Canon, HP, Lexmark & Brother). The problem I found is that most of the multifunction printers seem to be geared towards quality photo printing and tend to suck when it comes to general colour documents, which what I tend to do most.
The only exceptions appear to be a handful of the Canon models and up until this morning I was settled on the MG6250 - despite concerns about it's wifi and ink consumption. However I had another go at fixing my current printer and managed to get it working again. I know it's only a temporary fix, but it buys me some more time to consider my options and look at separate printers and scanners.