Decided against waiting for a non-existent clear spell and eventually ventured out mid afternoon. Pretty wet and pretty quiet on the whole with highlights being 1 green sandpiper & 5 snipe seen on the Wildfowlers' Pools, a wheatear by the Walled Meadow and a whimbrel on the marsh.
All of this was soon eclipsed, (no pun intended) by the discovery of two garganey on Frog Pond. Not too sure whether they're a pair (ie eclipse male & female) or an adult female and juv. Only had binocs with me and I didn't want to flush them, but one of the birds was almost certainly an adult female.
Not quite a Sabine's gull (see Heysham blogsite...) but a very welcome find which made the dousing seem worthwhile.