I use the rule that the sum total of the sire and dam of a proposed mating
does not exceed double the breed average

Byrony of Banlieue Certificate under original (1980’s) scheme
Cause a Storm  23-17
High Society  3-7
Highclare Temptress of N  6-6
Jack Frost  8-9
Magic Spell  28-29
Scarlet Lady  12-13
Secret Affair  4-7
Seductress  12-5
Serin  8-11
Showboat  1-1
Silver Cameo    5-6
Silver Charm    6-6
Silver Lining      2-2
Silver Tiara       6-5
Sleet  20-7
Sonnet  11-11
Spring Tide 17-6
Stonechat  old BL under original (1980’s) scheme
Stormcloud  0-1
Stream Dancer 3-3
Sun on the Sea 5-4
Surprise Surprise  2-5
Sweet Charity   7-7
Wendle 6-4
White Knight    1-6
Whittaker  12-4
Whittington 11-16
Wicked William  3-3
Wilmott  6-10
Winchester  13-10
Wish Me Luck  10-10
Wizard   3-3
Woodpecker  Certificate under original (1980’s) scheme
Wordsworth     20-26  
Sun on the Sea 5-4
Well Connected to Megwellyn 6-5
Silkin 5-6

Unaffected

Cause a Storm
Sakita
Silver Cameo
Silver Tiara
Sonnet
Sun on the Sea
Surprise Surprise
Sweet Rosebriar
Whittington
Winchester
Wild Thyme
Wish Me Luck
Wizard
Well Connected to Megwellyn
Silkin

WSS Joint Health Group advice is followed not to breed from dogs who have failed the eye test for Glaucoma, and to use family members only after thorough investigation and due consideration

Secret Affair
Showboat

The following Northey WSSs are recorded by the WSS Joint Health Group as being the parent of fitting offspring

Woodpecker (5 cases in UK)
Sonnet (2 cases in UK)
Winchester (2 cases in UK)

Northey Over the Rainbow (1 case in Holland)

WSS Joint Health Group advice is followed not to breed from parents again, and to use family members only after thorough investigation and due consideration