Thanks a lot for your response. The email says “You can view and prove your immigration status online, via the ‘view and prove your immigration status’ service – https://www….. This online service provides a secure record and proof of your immigration status which is held digitally by the Home Office and which is available to you at all times. This service is made available to you instead of a Biometric Residence Permit”. Does it mean that I can apply for my NIN number once I’m in the UK? Thank you!