will i be transfered to uc or can i stay on esa ?

hi mods, i was put in esa support group many years ago and have also been awarded pip daily living and mobility on severe mental health problems (i think its called section 35 in esa) i want to know if i will be forced on to universal credit or left on esa due to support group. if i am to be moved to uc what is the time scale the dwp hope to transfer everyone is it area by area and will it involve a new assessment even if i have only recently been assessed. many thanks bb.

thank you gary, would it be a good idea to send my pip assessment report and award letter to my gp for his records as i believe it to be a good report and covers my ability in the descriptors very fairly or would he not accept the assessment as it was not done by him, do you think it would be to my benefit for future support letters if needed in future , many thanks bb.