Former Pragatisheel Samajwadi Party leader Shiv Kumar Beria joined the Bhartiya Janata Party on Monday ahead of the Uttar Pradesh Assembly polls. Beria, who is also a close aide of Samajwadi Party patron Mulayam Singh Yadav, was a minister in the SP government, sources said. Former UP MLA Pramod Gupta, brother-in-law of Mulayam Singh Yadav, also joined the saffron party …