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.
I prefer steaming the potatoes. The amount of time required to boil potatoes depends on the size and cut. Potatoes that are boiled whole typically take 20-30 minutes. You can reduce the cooking time by cutting the potato into cubes, which usually cook in 10 minutes. To determine if your potato is thorough boiled, poke them gently with a fork. The fork will easily penetrate the potato when it is cooked completely through.