Is A1 form required for a 5 day Conference or Training course ?

Hi . I have plan to have a trip from Germany to UK for a Training course . I applied for a Visitor Visa and I recently got my Visa (Visitor C Visa) . My question is : Do you required to have A1 form with myself to enter UK ? How much is the possibility for me to be denied to enter UK or be fined by Border control officer without having A1 form ? Thank you for your guidance .

Hi redcrabs,
I am unable to discuss immigration matters via this forum.  Including whether you will be permitted to enter the UK.
There is information held on our website: Visit the UK as a Standard Visitor
If you are being posted by your German employer and that you are still subject to the German Foreign authorities for social security payments then your employer should provide you with the certificate of coverage for Germany.  We cannot provide you with a A1 certificate solely on the premiss of entering the UK.
Thank you.