 London Stock Exchange Group PLC said Wednesday that pro forma total income for the first quarter rose on an underlying basis, and that its integration of data provider Refinitiv is well under way. The stock-exchange and financial-information company said pro forma total income--excluding recoveries--for the first three months of the year was 1.68 billion pounds 2.34 billion compared with GBP1.70 billion for the same period last year. 