The organisers of the London Marathon say they "fully expect" it to go ahead as planned on Sunday, although "security will be reviewed", after two explosions hit the Boston Marathon yesterday, although "security will be reviewed."
Vale of Glamorgan MP Alun Cairns is among the Welsh runners taking part, and has urged others to "turn out in confidence."
As a runner in Sunday's #LondonMarathon I hope all athletes & spectators turn out in confidence & defy the terrible acts in Boston
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