This is just an annual event ran here in Northern Ireland although living in England there should be clubs near you that race
These cars where running 19t motors so would hit about 35mph or so down the straight, the buggys was unlimited. I had a 4.5 brushless motor in mine so i've no idea what sorta speed I was hitting but it was well in excess of 35mph.
Outdoors in my pan car I could hit about 80-90mph, its mental.