Cameron draws up plan to help tackle Calais migrant crisis

French gendarmes chase migrants near a closed petrol station who gather as they attempt to access the Channel Tunnel in Calais, France, July 30, 2015. REUTERS/Pascal Rossignol

LONDON (Reuters) - Prime Minister David Cameron drew up plans to help France tackle a spike in attempts by migrants to enter Britain illegally via the Channel Tunnel, but warned there was no quick fix.

Cameron is under pressure to deter the migrants, many of whom have travelled from Africa and the Middle East, after disruption to cross-Channel passenger and freight traffic.