What (a) number of official international trips is (i) he and (ii) his deputy planning to undertake in the 2019-22 medium term expenditure framework, (b) will the (i) destination, (ii) date, (iii) purpose and (iv) number of persons who will travel with the delegation be and ( c) is the detailed breakdown of the expected cost of (i) flights, (ii) accommodation and (iii) any other expenses in each case?