Ed and Oucho's Excellent Inventions - Series 2 - Spy Buggy

Children's science series in which Ed and his cactus companion Oucho travel all over the country making inventions from bits of old rubbish that they find in the back of their van. Ed and Oucho are in Willesden trying to build Josh's 'spy buggy', a buggy that can fire secret party messages right under the teachers' noses. Nelson the pigeon has stolen their phone; how will they get science help now? What happens if the Big Big Cheese calls them? Will Ed and Oucho manage to make the Spy Buggy and get to the party in time?