Although legally you do not have to have a copy with you, you must ensure that you have read and understood the General Licence and that your actions comply with the terms.
Links to the licences can be found on the BASC website: –
Scotland is https://basc.org.uk/gl/scotland
Northern Ireland You cannot shoot Canada geese outside the shooting season which is 1 Sept – 31 Jan.
Make sure you are working to the current General Licence rules and remember they get renewed annually.