Yes, must have been in connection with the Bicentenary match, which was a cracker for 4 days, and rain washed out the last one

.
Presumably Worcs didn't have a match at the time, and most other counties did.
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My first match: Headley, Turner, Stimpson, B d'Oliveira, Hemsley, Yardley, Ormrod, Wilcock, Gifford, Holder, Carter
(JPL v Essex, 18/7/71, WCCC won by 8 wkts)