5ft nothing bike recommendation

[vickster]

Triban 3 are aplenty second hand and great value. They do 650b wheel sizes on their smaller frames which are proportionately better for those smaller in stature.
https://www.ebay.co.uk/itm/11605673...Ct8aMkFS0i&var=&widget_ver=artemis&media=COPY

https://www.ebay.co.uk/itm/35514697...Ct8aMkFS0i&var=&widget_ver=artemis&media=COPY

She does say no road bikes in the OP

Decathlon / Triban / Btwin are a good option potentially

 

[MichaelW2]

The standard 700C wheel size is the largest that will fit into a traditional med/male frame of good design. To make smaller frames with big wheels you have to bodge the geometry and you end up with a bike that is awkward and handles badly.
Small rider->small frame->small wheels.

The selection of smaller wheel sizes inc
26"MTB. The former gobal standard is still really good and you can get road ( but not race) tyres from 1" and wider.
27.5" or 650b. The former French utility wheel now reborn as a smaller off road size but bigger than 26. Lack of commuting style tyres in bike shops.

650c: niche small road racing size: lack of med tyres

For 5" rider I would recommend 26" MTB wheel size.
26MTB road bikes are not common but

Frog Road 70 26-Inch Junior Bike

 

[Dadam]

For 5" rider I would recommend 26" MTB wheel size

For that size rider I'd recommend this bike
https://minimumworld.com/mc2385b-sm...P6Sq34wQdFznZ-KylodFxecXDaeoI04xoCr9oQAvD_BwE

 

[biketrailerguy]

I am based in Surrey

Just seen this, answered a question I was about to ask, as I have a Specialized Hotrock, given to me by my LBS - but I'm in Leicester and it would need a fair bit of tlc.
I've no idea whether it'd be suitable, but it'd be a freebie, so no ££ loss if you'd been local ... best of luck.