What types of activities do you have planned that would require outside funding?
Whatever the community can think of. I haven't given it a great deal of though myself in anything more than general terms. I see the chapter as existing to facilitate the ideas of the community, there's no need for those running the chapter to come up with the ideas.
How do you intend to get that funding? And why shouldn't this activity be pursued by the WMF, instead of the WMUK?
The same as any other charity: donations from people that support our cause. Being a UK charity means donations from the UK are tax deductible. The way the UK does it (other countries may have similar schemes, I don't know), is that when we receive a donation of, say, £100 we then submit a form to the taxman and he gives us another £25 (or somewhere around that figure). That's £25 the WMF could never get.