Hi Ally......
In England, when booking online flights using both
www.ebookers.com and
www.cheapflights.co.uk ,the tickets are sent direct to your address under registered mail.If you book too far ahead.....like now for Xmas, you may have to wait a while for your tickets to arrive.Dont worry,the airline often doesn't issue the tickets so far ahead.You will get a booking reference no which you should print out and ring them if you have any problems.Its safe.Use a search engine like Google and type in cheap air tickets and plenty of online flight outlets will be displayed
Good Luck