(ADVISORY- Follow European and UK stock markets in real time on the Reuters Live Markets blog on Eikon, see cpurl://apps.cp./cms/?pageId=livemarkets)
* FTSE 100 down 0.15 pct
* Merlin falls 21 pct
* Pearson jumps on forecast optimism
* No bounceback for Convatec
LONDON, Oct 17 (Reuters) - UK shares edged lower on Tuesday, with a flurry of trading updates animating early deals, such as tourist attractions operator Merlin Entertainments, which saw its shares collapse on dissapointing summer sales.
The FTSE had retreated 0.20 percent by 0839 GMT, barely moved by fresh data which showed British inflation rose to its highest level in more than five years and could make the Bank of England more likely to raise interest rates next month.
Shares in Merlin plunged as much as 21 percent, its biggest fall ever, after the operator of Madame Tussauds waxworks blamed a series of attacks in Britain and unfavourable weather for a dip in trading in its key summer period.
"Given all this additional uncertainty we see less and less reasons to own the shares," Liberum analysts said as the shares, trading at about 355p, touched three years low levels.
Mediclinic retreated 3.5 percent after a trading update and there was no bounce back for Convatec, still down 0.8 percent, after a profit warning triggered a sell-off on Monday and a 26.6 percent fall.
"While the market may be quiet, it is currently extremely intolerant of any company that dares to miss forecasts", Chris Beauchamp, an IG market analyst, wrote about the slump of Convatec on Monday.
British education group Pearson on the other hand was the FTSE 100 top performer, with a 5.2 percent rise, after it said it expected full-year operating profit to come in at the top half of its forecast range.
British challenger bank Virgin Money also shone after reporting gross mortgage lending of 6.5 billion pounds to the end of the third quarter and said it had seen robust customer demand due to low unemployment and a resilient housing market.
Investec analyst Ian Gordon said he expected the "stunning performance" to lead to new consensus upgrades on the stock.
Golba miner Rio Tinto was up 0.3 percent after it said it lifted third quarter iron ore shipments by 6 percent after modernising its haulage railway in Australia's outback.
British online fashion retailer ASOS which increased its outlook for sales growth in its 2018 financial year, saw its shares rise by 1 percent. (Reporting by Julien Ponthus; Editing by Alison Williams)