Conservative leader Boris Johnson today officially took over the charge as British Prime Minister after Theresa May handed in her resignation to the Queen. <br />'' <br />'' As she relinquished power after three years, Mrs May said being Prime Minister had been the greatest honour and wished her successor well. <br />'' <br />'' Mr Johnson is expected to use the opportunity to increase the number of women in full cabinet positions and boost the representation of ethnic minorities. <br />'' <br />'' Prime Minister Narendra Modi has congratulated Boris Johnson on assuming office as the Prime Minister of the United Kingdom. In a tweet, Mr Modi wished him success. <br />'' <br />'' The Prime Minister said he looks forward to working with Mr Johnson to further strengthen India-UK partnership in all spheres. <br />''