There is no minimum order limit.

All UK orders are normally sent by Special Next Day Delivery. International orders are sent by Airsure International mail (registered, but not signed mail) or by Signed For International mail (registered mail and needs to be signed on delivery). It normally takes 4-7 days arrive to any destination.
For UK orders £8 flat fee will apply. For orders to US and Europe countries there is a £12 flat fee.