Bell Chime Timer

A couple of evenings back we had two mains outages in the village.  One for ~half an hour and a shorter one for ~30 seconds.  The two timers which inhibit the church tower clock from chiming the hours and quarter hours overnight (23:00 - 07:00) don't react well to this sort of disturbance, so although the hour timer survived, the quarter hour bells were not inhibited and carried on through the night.  
Unsurprisingly, this is not popular with anyone living near the church!   

Our neighbour who is one of the church wardens asked me to have a look this afternoon, on the off chance we could avoid a call-out charge.  

The yellow component in the bottom left is a single Nickel Cadmium cell, which is there to maintain the timer in the event of a mains outage - but this one appears to have failed.  It was a minor fight to get at it,  and since a replacement timer is £120 we're intending to try a replacement cell (£1.70 plus postage) before we go down the expensive route. 

Hopefully - that will fix it - and there won't be another mains outage before we get back to it. 

The photo is very noisy - Church clock chambers part way up the tower were not designed with photography as a priority! 

Auto winder mechanism here in this blip 
A part view of the clock here