Address was not changed on driving licence and was caught for minor traffic violation

I hadn't changed the address on my licence whilst I was temporarily not living at my house, I have all my mail redirected. I have just been caught for a minor traffic violation which I have admitted to, so I have to send off my licence. But it says on the letter that if my address is incorrect to fill in the appropriate part on the licence and send it back and not send it to the DVLA with the payment etc. should I do this or will they fine me for not telling them sooner. Any help would be appreciated Are