Tighter security and pre-screening checks for travellers means that anyone intending to fly to the UK, USA or Canada must provide certain information ahead of time. The following information is a guideline to what information is required as part of the pre-screening process. NB. Once you have obtained the necessary paperwork (e.g. ESTA approval for the USA or eTA for Canada), you should bring the confirmation with you as it may be required at check-in.