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With temperatures today in London up to 27 degrees, marathon event organisers are preparing competitors for what may be one of the hottest Marathon weekends in years. Event Organisers are providing important weather updates for runners who may not be used to racing in such high temperatures. For our readers who also organise sporting events that take place in warm climates (or the odd hot UK day!) it may be useful to take note of the warnings that Virgin Marathon event organisers are providing their participants including: Adapt your goal according to the conditions. In the conditions forecast for Sunday, you should slow your planned pace. If you were planning to run in fancy dress, please t