Conservative MP Amber Rudd said Margaret Thatcher would not be surprised that some people are using her death as an opportunity to protest.
Speaking to Daybreak she said: "Be very careful, because peaceful protests is ok, anything else is not."
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Shouts of "we are not afraid" rang out across Barcelona as people gathered to pay tribute to those caught up in the deadly terror attacks.
Showers often confined to northwest Scotland - filtering further south at times.
A Spanish court has released photos of four suspects they are hunting over the terror attacks in Spain.