Good shout. Most dependent on wind direction on day. So assume favourable conditions for each. I'd put Hove Park before PP although yet to do PP. Eastbourne is around Shinewater Lake flat but not all on paths so hard in the wet perhaps. Clair Park no idea so give it third place. Hasting's is the fastest for me.
Bevendean
Peacehaven
Clair Park
Eastbourne
Hove Park
Preston park
Hove promenade
Worthing
Clair Park is local for me, done it a few times. Definitely not a PB course. 4.5 laps, hilly, narrow tarmac paths and can be crowded (path barely wide enough to pass other runners in places). It's broadly a long uphill (with as short steep bit) followed by a long downhill. My PB there is about 90s slower then Hove Prom and Hove Park (at times of comparable fitness)
I'd rate Hove Prom faster than Hove Park or Preston Park as long as it's not windy.
Anyone done Tilgate ?