In the meantime, in March 2017 the government announced that VAT is to be added to the cost of roaming in countries outside the EU. The result is that the cost of calls, texts and data is set to go up by 20%. At the time of writing, we don't know for sure when the charges will come into affect.
Bring to boiling. Add sweet potatoes. Cover the pan and cook sweet potatoes for 10 to 12 minutes or until just tender on the outside but resistant in the center when pierced with a knife. For soft, tender sweet potatoes, cook for 25 to 30 minutes.
1 If you are cooking multiple potatoes at once, you will need to increase the cooking time by about two-thirds. 2  For example, if one large potato takes 10 minutes to cook, two large potatoes would take between 16-17 minutes. If you are cooking multiple potatoes at once, you will need to increase the cooking time by about two-thirds. 2  For example, if one large potato takes 10 minutes to cook, two large potatoes would take between 16-17 minutes.