"Can you find out who the vendor is and approach them directly?"
No, no, no, no, no,no.
If I'm a vendor and I appoint an Estate Agent, I want them to deal with it. I don't want prospective purchasers contacting me directly.
It is more likely that the EA said to the OP to hold off for a few weeks as they are expecting a lot of interest and want to narrow the prospective pool of people they will deal with. As in a cash purchaser or a first time buyer, not trying to sell their own.
Either that or he took pity on an apparently naive prospect who hasn't a chance of getting the house!
mf