Falcon Buses 39A and 39B Woking shopper buses reverse twice into side roads to turn at the end residential no through roads - once on Bingham Drive and again on Robin Hood Road.
The 39C variant of the above has one mid-route reverse, on Clayton Road in Horsell.
White Bus 48 reverses in Pirbright Camp on Slade Road, on the edge of the army barracks (buses used to run through the barracks to reach Deepcut many years ago, but that practice was stopped and buses instead turn to use the public roads through the woodland). For most journeys this is ther terminus, but the first and last trips extend from/to Frimley Park Hospital, making this a mid-route turn.
The Falcon 690 school route also makes the above mid-route Pirbright turn, and coincidentally is the same bus that makes all the 39A/B/C turns described above between its school runs on the 690! So that bus and driver will be doing up to 12 mostly tight in-service reverse turns a shift on Mon/Wed/Fri, usually in a 10.8m Enviro during term time due to the 39A/B/C interworking with the 690.
Reptons Coaches 571/572 Spelthorne shopper buses reverse into a side road at the end of no through road Boundary Road in Ashford to turn around mid-route. Their 574 also serves this point, but only as a terminus point.