Sadly the days when you simply registered for VAT are over. Nowadays you have to demonstrate you have a trading company.
If you raise enough money to run your formula 1 car for the year that is fine. If daddy gives you £100 and you spend the next year flying a helicopter....... The VAT inspector will also come round for a cup of coffee every so often and cross examine you about what trading you are continuing to do. Their powers are not insignificant including fines
I am glad OP is off to see his accountant before embarking on this dubious trading