Thanks for the reply Milou - I have to say I don't remember that many roads at Seaford apart from the first mile or so along the seafront and then up to Bishopstone and again at the end, apart from that it's hilly downland up into Alfriston and then again at Seaford Head after the flat bit along the Cuckmere river which is why I thought they might be similar. Are we talking about the same race?
Don't worry though - I'm intending to turn up at Steyning anyway to see for myself - just a half though