A Hanafi Mufti propagates the view that it is permissible to combine Zuhr and Asr in the tents on the Day of Arafaat.

Answer

The mufti can't be a Hanafi. Maybe he was born in a Hanafi home, but he will not be a proper or a staunch follower of the Hanafi Math-hab in view of his personal opinion presented as a 'fatwa' of the Shariah. Combining Zuhr and Asr in the camps/ tents in Arafaat is not valid, hence not permissible.

If anyone commits this sinful deed, he should, in addition to performing the Asr Salaat over, make Taubah. The combination is valid only if these two Salaat are performed behind the Imaam in Musjid Namirah.

No Math-hab teaches what this Mufti Sahib propagates. According to the Hanafi Math-hab, performing behind the Imaam of the Musjid in Arafaat on the Day of Arafaat is a shart (incumbent condition) for the validity of the combination. This is also the view of the Maaliki Math-hab. According to the Shaafi' and Hambali Math-habs, the combination is valid for only Musaafirs (Shar'i travellers) even on the Day of Arafaat. Thus, combination of the two Salaat on the Day of Arafaat according to these two Math-habs is the usual practice for Musaafirs.

Those who perform Zuhr and Asr together in their tents, must perform Asr in its time. If anyone has combined the two Salaat erroneously in this manner, they should make Qadha of the Asr Salaat which was not valid. The view which the mufti had presented is in conflict of the 14 century Ijma' of the Hanafi Math-hab.