A mass migrant regularisation launched by Spain's leftist government in defiance of a growing European crackdown on irregular immigration ends on Tuesday, with the final hopefuls scrambling to secure their legal status.

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…