Stanislaw Valendzec, Tracing Polish father

Hello to all forum users, may I wish you all A Happy & Healthy New Year. My question must have been asked many times so, I guess I should apologise for asking it again.

I was born in 1943, my father was serving with the Polish forces based in the Arbroath/BarryBuddon area, it's possible he was with a regiment that was part of the 10th Armed Cavalry Brigade. His name is/was Stanislaw Valendzec born 8th Nov. 1921 in either Sediece or Slediece. I have no service number or any other information but I would very much like to establish the facts about my parents as much as possible. Can anyone on this forum point me in a useful direction? Thank-you.

Valendzec has obviously been altered. Could it have been Walendzak, Walendziak ior Walendzik? Please receck spelling if possible.

Thanks to Polonius for your answer. The information I posted on my initial query is the only info I have.
Why do you suggest the spelling is wrong? It'd be most helpful if you could explain that! I have no way now of verifying or otherwise the info so any help would help.

Valendzec is not Polish because, first of all, no indigenously Polish names contain the letter 'v'. That sound is produced in Polish by the 'w'. Secondly, the combination -dzec is rarely if ever encountered in Polish names. And thirdly, Walendzik (1,200 users) and Walendziak (over 500) are well-known surnames in Poland. Others include Walędziak (app. 350) and Walędzik (some 200). They all probably originated as patronymic nicks meaning ‘Val’s boy’.

Sediece or Slediece

most probably that's Siedlce. There are no places in Poland named exactly as you wrote.