Really nervous right now and thinking all sorts. Basically we were served a section 21, not much reason given except there'd been a change of circumstances for the landlord. We've lived here for 4 years, not been many issues (rent always paid etc) until lately - repairs needed doing but landlord wouldn't do them and it was all starting to go a bit sour so we were looking to move anyway. Then we got served the S21 so have been looking for somewhere else.
Anyway, we have found a perfect house near us and have registered our interest, filled out all the paperwork. Had a call this morning from the agent saying LL wanted more info, one of the questions being why were we served a Section 21.
This has instantly made me nervous now and making me think that the fact we have been served will affect us renting anywhere else. Will they be thinking we are bad tenants? Or is this a standard question that is asked if they know potential tenants have been served? 
Any advice would be great