Thanks NoRomBasic.
There's no such thing as too much info! I'll give that Photomatix program a try. I'm also on 8.1DP and have the Nokia beta camera app as well but bracketing is still pretty slow - even for stationary people with HDR to enhance the background in poor lighting situations there is too much ghosting.
A shame because in android, HDR is a pretty basic function built into every android phone I've used. I appreciate that the 1520 is taking photos at a much higher resolution, but it would be great if there was a HDR mode which turns off downsampling and would just take HDR shots in 5MP mode. Sometimes you just need an auto HDR mode when you don't have a lot of time to compose the shot/giving it to someone else to take and therefore can't afford to fiddle with the manual settings.