[أحمد العبدالله]

Dear Brothers

I've read all the subjec and your comments.In my humble opinion, the sentence is correct.

Why? Because the word regularly is not necessarliy used in the present tense. In fact , it's a word that expresses a repeated action whether this action is still repeated in the present or was repeated in the past so what I mean is that it can be used in the past simple tense to express an action that was repeated in the past but it isn't now. As the sentence is indirect the past simple was changed into the past perfect.

Also, I'd like to say that the adverb regularly is like always,never, often etc. which can be used in the past* For more information refer to PRACTICAL
ENGLISH USAGE or PRACTICAL ENGLISH GRAMMAR

wish you the best

Ahmad