This in from WightLink, in their own words. Ed
Please be advised that owing to technical reasons there are revisions to the published timetable on the catamaran service between Portsmouth Harbour and Ryde Pier Head until Thursday 25 August
From Portsmouth Harbour
0640 sailing is cancelled Tue-Thu
1040 sailing is cancelled Wed
An additional sailing at 1015 will operate Tue-Thu
All sailings operating at xx40 minutes past the hour will be operated by a charter vessel – crossing time approx 25 minutes
From Ryde Pier
1110 sailing is cancelled Wed
1915 sailing is cancelled Tue-Thu
An additional sailing at 1047 will operate Tue-Thu
All sailings operating at xx10 minutes past the hour will be operated by a charter vessel – crossing time approx 25 minutes
Wightlink would like to apologise for any inconvenience that this may cause. Passengers concerned about their sailing(s) should call Wightlink reservations on 02392 827761.