Consumer expert Martin Lewis has shared some tips for your holiday spending while you are abroad. He shared the key advice during his BBC podcast . During a question and answer edition of the podcast, a query came in from a mum whose 18-year-old son is heading off on a lads' holiday. She asked what the best spending card would be for him to take along, or whether she should simply give him cash instead. She explained that she was reluctant to give him a credit card as she wasn't confident he