Hi Andy I am no expert but.... Our AX has today cut out when driving along, applying the indicators seemed to cause it to stop. Further exam showed it would jump start OK every time but stop soon after taking off the jump leads. So, looks like alternator problem, confirmed as low output when connecting up a voltmeter. So, whats this to do with your problem? Well, doing reserach I found comments to show if alternator is failing then consumption increases as alternator feed the EMU and makes the mixture rich. We too have noticed an increase in fuel use. Your dodgy lamps may also indicate alternator failure. Although it could be the voltage regulator only in the alternator at fault. Hope this helps, as I said I am no expert. Chris