I am just reading Josef Zaluski's memoirs. He served in the Polish Light Horse of the Guard. After the fall of Madrid in December 1808 he has the following to say:
"Close to this town [Tordesillas] our regiment was directed to the left to observe the movements of the English army which Napoleon was already pursuing. Here we had a test against the English cavalry, which consisted mostly of Hanoverians, close to the village of Servinianos. From this village I was sent on patrol by the adjutant Major Duvivier with a platoon from the 5th Company, and was led into an English ambush by a Spanish guide. Having split my platoon into two units, the first one I sent to the right under the command of Sergeant [Józef] Waligórski, newly decorated with the Legion of Honour for having captured a flag at Somosierra, whilst the second one I sent a little to the left, having under me a Sergeant Wojnarowski, not yet decorated, but an old soldier. Soon we were attacked and chased back by superior English forces. In the confusion, young [Roch] Rzuchowski, brother of the famous colonel of Krakus Horse, had his saddle slip off his horse. It was almost a miracle that I with Wojnarowski managed to save this young man from English captivity. Then Squadron Commander Tomasz Łubieński and Captain [Seweryn] Fredro came to our rescue and repulsed the English horse, though Captain Fredro was wounded by an English sword, and Private [Michał] Żwan was taken captive by the English."
Is this skirmish ever mentioned by British eyewitnesses?