Ditto on the delayed FEDEX charges. Unless you are getting a specific discount becasue you are buying a package deal, it really is better to order multiple smaller orders of a couple hundred dollars each and have them each shipped separately via economy shipping (typically either Royal Mails or Parcelforce). Spread it out over several shipments and several days at least so it doesn't look like you are ordering a lot of stuff at one time, as the customs folks may lump all the shipments together for a daily total of imports, at which point your customs liability increases. Scot web gives you free shipping as long as each order is over 100gbp (about $150US).
Good luck.