People should take precautions while witnessing the "amazing celestial event", an expert says.
A partial solar eclipse is set to be visible across the South West on Wednesday evening.
In Devon and Cornwall, the eclipse will start at about 18:18 BST, peak at 19:15 and finish at about 20:10 - but how can it be viewed safely?
Consultant ophthalmologist David Jones said his top four tips were to use eclipse glasses, a pinhole, colander or a cereal box.
He encouraged people not to miss the "amazing celestial event" but to enjoy it safely.
With some shops running out of stock, it may be too late to buy eclipse glasses - but you can still safely watch the spectacle using some household items.
The firm says it has invested in the chalk stream and water quality is "influenced by a range of factors".
Look to the skies on Wednesday because one of the most spectacular solar eclipses for decades is coming the UK's way with likely optimum viewing conditions for many.