Manx2 will be bumpering the weekday and Saturday flights between BLK and IOM.
The Blackpool route will include 5 more flights per week from the 23rd July. Monday to Friday will become 4 times daily. Saturdays will include a morning departure, but Sundays will remain with two flights.
Check the Manx2 website for the flight times. Havn't been published, but if you try to book after any of these dates, then the new flights are available.
(Don't know whether I have published this before or not, if so, sorry)