There are two days of Bank Holiday prior to 08th April, and the final few days are a weekend! Where an error is found in an application, a couple of days is insufficient to rectify the issue since NPPL Advisers are volunteers who have other jobs.
May I strongly recommend applicants use MARCH 08th as the deadline to reach the Light Aircraft Association, to allow 10 working days for the LAA to process, correct any errors, and send to the CAA, then 10 working days at the CAA as per their website. Any later date may mean that an error in your application cannot be reviewed and rectified in time.