One of the South's main train companies is investing £350,000 to make carriages cleaner for their passengers. First Capital Connect, which runs services on the Brighton line, is using equipment from hospitals to deep clean all 221 trains in its fleet.
David Stacham from First Capital Connect talks us through the big clean.
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Tuesday afternoon's weather for the west of the region
Tuesday afternoon's weather for the east of the region
Tuesday's weather for the west of the region