I got my Schengen visa from german consulate and travelled to Germany earlier this year but from the time of issuing visa to travelling, my travel route changed.
Itinerary i submitted was: Delhi to Frankfurt and then Frankfurt to Delhi.
But later on when i travelled, i was to visit London for official trip. So i travelled via Eurostar from London to Brussels and then to Cologne. And While returning i had a connecting flight from Frankfurt to Amsterdam to Delhi. All my stay was in Germany only but because of new travel route, my passport got stamped in London while boarding Eurostar and then in Amsterdam as flight from Amsterdam to Frankfurt didn't involved passing through Immigration.
Now i will be visiting Germany again and will be reapplying for Visa but i am wondering as there are no German stamps in my passport, will it cause any issue?