Two white lights in Devon, England evening sky

Two white lights with forward blue colour appeared in the evening sky. Visible for seconds before disappearing. Clear night no cloud, no stars shoeing. No noise and moved in a straight line from when i noticed it until it disappeared. No trail and both lights were close together. The lights moved very quickly. Impossible to guess scale due to the fact that the lights were visible for such a short period of time and there was no bench mark. Hazarding a guess i would say they were quite low and moved much, much faster than a jet.