* FTSE 100 down 0.1%, FTSE 250 down 0.4%
* Pharma, banks biggest drags on main bourse
* Imperial Brands up on dividend plans, share buyback
* GVC slumps among midcaps after a media report (Adds company news items, updates share moves throughout)
By Muvija M and Shashwat Awasthi
July 8 (Reuters) - London's FTSE 100 ended in the red on Monday as markets remained subdued on dampened hopes of a hefty rate cut by the U.S. central bank, while tobacco stocks jumped on Imperial Brands' buyback and dividend revision plans.
UK blue-chip index edged 0.1% lower in its third session of losses - its longest losing streak in two months, while the midcaps fell 0.4% as a weaker sterling also weighed on its domestically-exposed constituents.
Upbeat U.S. jobs data last week put off bets that the U.S. Federal Reserve would give in to calls for aggressive policy easing.
"Ordinarily, a strong set of employment data would lift global equity sentiment, but seeing as a large portion of the rally was driven by the belief that the Federal Reserve will cut rates this month, equity markets are broadly lower today," CMC Markets analyst David Madden said.
Imperial Brands helped contain the losses on the blue-chip index, adding 2.2% after the tobacco company announced plans for a 200-million-pound buyback and said it would revise its dividend policy. Rival British American Tobacco rose 1.5%.
Losses in the blue-chip index were spread across sectors, with pharmaceutical companies and banks most hit.
Miners, however, snapped a three-day losing streak on the back of higher copper prices. The sub-index had slipped last week after China's top steel mills formed a group to probe a record surge in ore prices.
British Airways owner IAG lost 1.4% on news that it was facing a record $230 million fine from the UK's Information Commissioner's Office for the theft of data from 500,000 customers from its website last year.
Asset manager Schroders was among the biggest FTSE 100 losers with a 2.6% drop after brokerages Jefferies and Barclays cut their ratings on the stock.
Online gambling firm GVC slumped 7.1% to the bottom of the midcap index after a Sunday Times report that the company was facing questions as its CEO sold its Turkish business to a partner associated with a stud farm.
Shares had briefly trimmed losses after GVC refuted the report, saying it does not benefit from any operations in Turkey.
Vivo Energy gave up 3.6% as the African fuel retailer issued a statement noting a media report in Morocco citing engagement between the Competition Council and industry participants as part of an ongoing investigation.
($1 = 0.7990 pounds) (Reporting by Muvija M and Shashwat Awasthi in Bengaluru Editing by Saumyadeb Chakrabarty and Gareth Jones)