Nothing makes a garden look messy like a broken-down, old fence panel. But there are only so many times you can nail a fence panel back up. Here's how to get that fence replaced properly so it looks great and lasts for a long time.Step 1Use a crowbar or hammer to prise away the old panel. This can be a dangerous job so it's best if you get someone to help you. Step 2Dig out the old post, including the concrete at the bottom too. Ensure the hole is 65-70cm deep so your new post stays secur …