The BBC and BC AD why not AJP?

Was out with friends last night and thought why doesn't the BBC do something constructive with our money and instead of replacing BC and AD with some other none sense they use a today and relevant catch abbreviation? So we thought AJP After John Prescott would be more of a real time and satisfactory term to use. After all he is now a Lord whereas when he started off he has something different? Just a thought..