I spoke to a future Pinsents trainee from my uni and he said that he only heard back and got invited to take the psychometric test at the end of January, so I wouldn't worry too much about not hearing back yet now. His application was with the Leeds office though so idk if the timeframe is any different for other offices.
I also emailed grad rec to ask a few questions before I submitted my application and they said this:
"Of the 1500+ applications received approximately 200 will be invited to undertake an online psychometric test, with those who pass being invited to an assessment centre where they will have a one to one commercial/behavioural interview with a Partner and a business simulation exercise. The assessment centres are conducted in February, virtually and/or in house".