Unfortunately, there are no such cards as others already said, especially for GBP. And in general, there aren't not much options available in market since last year when majority of Bitcoin debit cards stopped working. Mostly services promised that they will find new card provider soon, but until now we still have to wait. There are few cards available now, but their prices, fees and limits aren't very attractive to use. And I think you should forget about anonymous cards - hugeblack explained why wery well.