Lidl have this electric toothbrush in store from 29th Aug.
Looks pretty good value for the money and also includes 8 brush heads which clinches it for me.
Also 3 year guarantee as a bonus.
An extra pack of 8 heads can also be bought on same day for £3.99 - link in 1st post.
Spec is as below:
High-frequency, bi-directional rotation effectively removes plaque whilst cleaning teeth and gums
Fully rechargeable, with 3 settings for customised brushing
2-minute timer with 30 second interval for evenly cleaning the 4 jaw quadrants
With a charging base that provides storage for 4 brush heads, a handy hard travel case, and materials for optional wall-mounting
Includes 8 colour-coded brush heads with high-quality, rounded DuPont™ Tynex® nylon monofilament bristles