As I've said below, flight finders are not always helpful when searching for holidays. I'm not sure how to explain it, if I wasn't clear before, but I'll try.

The BA Holiday Finder works, but only from London airports. You can search for 5 night holiday across all BA destinations, or a subset of BA destinations, and sort them by price. But not if you want to fly from a non-London airport.

Using a flight search engine will certainly show the cheapest flights to a range of destinations using BA flights, from non-London airports. But that doesn't mean those flights will result in the cheapest BA holiday, if the accommodation at the destination is expensive at those times. I need to be able to find the cheapest total price, ie flight plus accommodation.

So yes, there are lots of tools out there that are useful for flights. I'm not trying to find flights. What I'm trying to do is use the 'BA Holiday Finder' tool, with a starting point that isn't London. I can't get it to do that. I don't know if it's possible. I don't know why it isn't possible. I've changed my profile to show different airport preferences, but it still only allows me to select one or all of the London airports.

I don't see how it's possible to ask a phone agent either. The holiday finder allows you to search month by month, across a huge range of destinations. I can't ask a phone agent to do that.