London's FTSE 100 retreated from more than a five-month high on Tuesday as a stronger pound pressured exporters and investors remained cautious about a post-Brexit trade deal with the European Union. The domestically-focussed mid-cap FTSE 250 index fell 0.1%, with shares in Upper Crust owner SSP Group tumbling 6.5% to the bottom of the index after Morgan Stanley downgraded the …
