Just as our dear Prime Minister likes to say, ‘you can’t fatten the pig on market day,’ so it is with appeal letters. Just as our dear Prime Minister likes to say, ‘you can’t fatten the pig on market day,’ so it is with appeal letters. Unless you are very lucky, the appeal letter won’t work miracles. But if you tackle it intelligently you can increase your chances of getting the best result. Before we get to the actual writing, we need to agree on one thing: more than anything else, the effectiveness of your appeal letter depends on your audience. Let’s say you are going out to committed, regular…