Criterion of travel and the distance that gives a traveler the right to shorten Salah

Q 2: I travel with my brother to London, which is around 120 km from the city where we are studying, and we return on the same day. So we combine and shorten the Zhuhr (Noon) and the ‘Asr (Afternoon) Prayers, and sometimes we combine the Maghrib (Sunset) with the ‘Isha’ (Night) Prayers. Is this permissible? Is it considered combining two Salahs (Prayers) at the time of the later one?

A: If you travel 80 km or more from the place of your residence, you can combine and shorten Salah until you return to the place of your residence, unless you intend to stay in that place for more than four days.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.