I usually book all my holidays on 1st April every year for the next year, but have been told by manager iwon't be able to do that as new system will be made available to colleagues sometime soon this year. Have booked 2021 to 2022 last April and now want to book 2022 to 2023 on 1st April this April. Can they refuse my holiday booking form? I don't want to wait indefinitely for new system and miss my choice of dates, is my manager just trying it on,? Any advice would be appreciated. Many thanks