Hi
@Alastar this sounds similar to the issue reported by smilieman in the other topic, would you mind trying the two scripts I added there?
1st: https://www.elkarte.net/community/index.php?topic=5790.msg40890#msg40890
2nd: https://www.elkarte.net/community/index.php?topic=5790.msg40906#msg40906
and report here the results?
Thanks!