Tier 2G after T4: what academic papers should I provide?

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Hi guys,
I finished my master's course in the UK this autumn and now applying for a Tier 2 General within the UK. According to the following rule https://www.gov.uk/tier-2-general/knowledge-of-english I should provide an evidence of having an academic qualification taught on English to meet Tier 2 visa requirements.
My Tier 4 visa expires on 30th of January, but I won’t receive my diploma until late February, so the best I can get from my university is academic transcript and “to whom it may concern” letter. Is it ok to apply for a Tier 2 visa providing transcript and letter only? Has anyone done that before? Cheers!