PT fixed term contract ending & new one starting after s break

Me and 4 colleagues have short term (all less than one year) part time fixed term contracts ending 31 March. We will then be given new (again, short term fixed) contracts after a break of about 2 weeks (the organisation is closed for 2 weeks). Some may have different hours/increased pay. We are all happy with this. Does the employer need to mark us all as terminated with HMRC (they use Basic Tools) and issue a P45 and then set us all up again?

Hi Caraxx,
If the contracts are coming to an end then the employer will need to make each employee a leaver on their payroll software and issue a P45.
When the contacts commence again the employee will need to be added as a new starter with a P45. 
Thank you.