Thanks for the suggestions - I saw that xda thread; will monitor things and let you know what happens next!
FWIW, "Fused location" now stands at 48% of total battery consumption with minimal further power used
I've had location services turned off since previous post
I'll turn my widgets off and report back
Edit - most odd. Same level of usage reported this morning, presumably from last night. Just rebooted and it's gone from the list (maybe because I switched location services off last night). I turned location services back on and will keep an eye on it to see if it arises again. If not I'll turn my weather widget back on see if that was the culprit
Edit 2 - ok - "problem" solved. Turned the weather widget back on (Fancy Widget) and Fused Location app suddenly began guzzling juice. Now I remember why I don't use weather widgets usually. Good spot, Paul77!
Edit 3 - so, it's not that straightforward afterall. Fancy Widget is uninstalled, Location services off, yet in the past two hours (while the phone's been in my pocket, turned off) "Fused location" consumed 78% of the total power used. Though I have turned gps and location stuff off, I can see that gps has been active for the past 2 hours. Admittedly, the overall battery level dropped only 3% in that time, so that 78% of all consumption doesn't amount to much, but it's more than 0 and very perplexing...
Edited by The Soup Thief, 09 March 2013 - 02:24 PM.