The former Brexit secretary is the latest MP to say he wants to succeed Theresa May.
Six children were taken to hospital after Friday's incident but two boys, aged 13 and 14, died.
Ten people have now died climbing the world's highest peak this season, amid reports of overcrowding.
Andrew Moffat started the "No Outsiders" lessons at Parkfield Community School in Birmingham.
The latest closures by his struggling Arcadia empire will include mostly Evans and Miss Selfridge shops.