does this look like a tornado forming?

This type of feature is often mistakenly identified as a funnel or developing tornado.

It appears to me that the lowering is due to the outflow from the rain immediately behind and to the left of the feature. It does appear to be a curl to the feature but is difficult to tell from a single picture but again, this curl can be caused by the out rush of air from the heavy rain that is very visible behind the feature.

It is my opinion that this is a lowering that is being caused by the outflow from the heavy rain rapidly lifting the unstable air just ahead of the rain. Most likely it is the beginning of a shelf cloud. Would have liked to seen this 10 minutes later to see if this feature continued, dissipated or did develop into a shelf cloud.

Yes it could have been but these actually happen a lot more common than many people think in the UK in fact we have more tornadoes than anywhere else in proportion to our size, so if you took a part of america the size of the UK then we would have more tornadoes than that specified place, it isn't defined as a tornado until the funnel cloud reaches ground

No. its only me