More than one million undocumented migrants and asylum seekers have applied for legal residency under Spain's mass regularisation programme, marking a significant response to one of Europe's largest immigration initiatives.

It's a race against time in Spain, where undocumented migrants have just hours left to apply for a special mass regularisation programme before the deadline expires.

By Corina PonsMADRID, June 29 (Reuters) - Several non-governmental organisations in Spain are urging undocumented migrants to register in a final push for a special mass…