Hello. To change the color of links at London Wiki, use the theme designer. First, click the Customize tab on the left. Then click the color box under "links" in the Page section and choose a color. After choosing a color, click the "Save, I'm done" button.
Hi Jackie. Are you saying that when you click the Edit button at the top of the page you get an error? If this is happening, please use Special:Contact/bug on your wiki to submit a bug report. Be sure to include a detailed description of what happens when you get the error and what browser you're using.
Hi Jackie. I approved your request, and because it involves two wikis, I'm using your message wall here on Community Central to follow up with you. As for "wanted categories being added," I just created them on both wikis (TT, LH) simply using a non-breaking space, so once the cache updates, they won't appear on Special:WantedCategories. Feel free to edit those category pages to add specific information if you want.
Please let me know what you want the logo for each wiki to look like, and I'll get started on those next.