Very tall, robust, up to 6 feet high, plentiful in hedgerows along half a mile of rural lane. Flowers pale lilac.
No interactions present.
...with Valeriana pyrenaica, but it's not Common Valerian. I believe it's common name would be Pyrenean Valerian.
Lat/Lng: 51.0459, -3.5496
OS grid ref: SS914285