in a word, yes.
---------- Post added at 12:35 ---------- Previous post was at 12:33 ----------
More Info...
Here's how I'd do it...
Home PC:
Outlook configured for IMAP to your ntl mail, using ntl's SMTP server
Laptop @ Home:
as above
Laptop @ Work:
As above, but using your work's SMTP server.
Webmail is a web interface to IMAP anyway, so will be in sync with Outlook