Wow! You have a lot of oaks! In which area of Wales do you live? I spent all my childhood summers in Milford Haven (my mother's home town.)
We have a live oak tree in our yard. It is an evergreen, and has no resemblance to the oak, except for the acorns which the squirrels love! also, in St. Augustine Florida, just a few miles from here there is a live oak that is 700 years old!