British seaplanes engaged German aircraft above Belgium in June 1917

In the meeting of the British War Cabinet on Tuesday 26 June 1917 reported the First Sea Lord that on 25 June three British seaplanes came across enemy aircraft in the vicinity of Roulers [Roeselare, Belgium?]. One was seen falling down while burning and two more seemed to be driven down controlless. The British aircraft returned home safely.

Source

The National Archives, Kew Gardens, England CAB 37-23-3-17