British food vendors can provide a variety of dishes for a Nigerian party. Some popular options include:

1. Fish and chips: This classic British dish consists of battered and fried fish served with chips (french fries). It can be a satisfying and hearty option for party guests.
2. Roast beef and Yorkshire pudding: Roast beef is a common Sunday lunch dish in the UK and is typically served with roast potatoes, vegetables, and a savory Yorkshire pudding.
3. Bangers and mash: This traditional pub dish consists of sausages (also known as “bangers”) served with mashed potatoes and gravy.
4. Ploughman’s lunch: This rustic meal is traditionally made up of bread, cheese, pickles, and a variety of cold cuts.
5. Pie and mash: This hearty dish consists of a savory pie filled with meat and vegetables, served with mashed potatoes and gravy.
6. Pub grub: Many British pubs offer a variety of dishes, such as burgers, sandwiches, and salads, that would be suitable for a party.
7. Afternoon tea: This classic British tradition involves serving a selection of sandwiches, scones, and pastries along with tea. It’s a nice option for a more refined gathering.

It’s worth noting that these are just a few examples of the many dishes that British food vendors can offer. There are many other options to choose from, so be sure to discuss your specific needs and preferences with the vendor to ensure they can provide the right selection of food for your party.