Additonal Documents without HSMP reference

Hi All,

If anyone have any ida how can i submit additional documents without Reference number, I send the original application on 25th September which was received by HO on 27th and now i have finally got the much awaited letter from employer ( i have already sent the Payslips + Bank statement) as i don't have tax system and requested them to consider the exception.

I will appreciate if someone can guide me or should i wait to receive the reference number and then send the letter ?

Regards,
Tipu

Even i want to send additional documents before decision is made on my application.

can u pls guide

thanks in advance