I looked at the 6 & 7 timetables and I suspect that First have saved themselves a vehicle of each route (down from 2 buses to 1) for the half hourly service by turning at the Guildhall.

 
Spoke too soon, back to diesels on the route today.

Mark

 
The majority of the buses allocated to the route this week are now electric. Quiet, smooth, more room inside and air-conditioned. This is a step-change in provision and makes for a huge opportunity to attract more passengers.

I'm wondering if there's any appetite within First Bristol Bath to take advantage of this though as they'll need to address the ridiculous position that in 2022, at the height of the Covid pandemic they shortened the route - since then,  the 6 and 7 turn round while they're ten minutes walk from the bus station.

The current 'Walk the length of Manvers Street' enjoyed by bus passengers arriving via Bath's London Road has also been enjoyed by passengers heading for the stations on the 6 and 7 buses since...2022. The new electric buses provide such an increase in quality of the journey but that's offset by the fact that the route is isolated the rest of the city's bus network

Mark