For 2020 Lytham Festival are using etickets with Ticketmaster. Which gives you two nice and easy options for your tickets for the festival. Within etickets there are mobile tickets and print at home tickets.
Once you have purchased your ticket all you need to do is log in to your Ticketmaster account and they will be listed under My Account.
You can then choose to download the PDF if you wish to print your tickets or you can access the tickets directly in the Ticketmaster app which means you can show your ticket directly from your mobile phone.