I was offered an attendant push manual chair by WCS, and had I been able to fit one in my home, would have been offered the power chair.
The criteria here (west midlands) is that you need to use a power chair inside your home, whether thats independently or for a carer to move you around.
To get a chair with outdoor capabilities (and that would only be an indoor/outdoor chair, never an outdoor/indoor...) you'd also have to prove you needed it for accessing work/education. They do not take the need to shop, socialise, get out etc, as a qualifying factor.
I declined, the bariatric chairs were too wide, and totally useless, neither me or DP could propel either and neither could be used in my house. I took a voucher and got an active style manual and then 'upgraded' (downgraded mobility wise) to a self propel power chair 5 years later via WCS.
They should take carer needs into consideration though, so do get a referral via your GP, though don't bank on getting anywhere with it quickly, some places are taking a year to see people and then a further 6+ weeks to get a chair, longer if you have to get a voucher and find a private supplier and fund the extra yourself.