The news is just out that HubSpot has raised another $32 Million in Venture Finance and I think that this will probably lead to U.K. , European and indeed Global expansion.Get the inside story from Brian Halligan of HubSpot:

http://blog.hubspot.com/blog/tabid/6307/bid/10480/Inside-Story-Behind-HubSpot-s-32-Million-Investment-From-Salesforce-Google-and-Sequoia.aspx