TOEFL is widely accepted by many UK universities and offered both online and offline.  Good scores vary from 90-95 and 88 is considered a standard score. The score card is valid for 2 years. 

The Pearson PTE Academic Test is widely accepted across the world. PTE scores are marked using AI; the use of AI provides accurate and fast results. You can get your results within 48 hours.

Many UK universities now accept the Duolingo test. Duolingo does not need to be booked in advance, you just need 1 hour to submit the test. The scores can be obtained within 48 hours.

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Learn more about the IELTS alternatives here.