Coulsdon South station via Cane Hill, Chipstead, Porters Wood, Long Plantation, Chipstead Bottom, Ramblers Rest (lunch pub/picnic), then through Banstead Wood & Park Downs and to Chipstead station. Drop out possible after lunch by 1 mile level path direct to Chipstead station. Text leader by 6:00 pm on 7th April to eat in pub.
Having checked out the Rambler's Rest, I note that the main courses may be a bit pricey for some people. However the pub also offers a fixed price lunch option - 2 courses for £20:95, 3 courses for £24:95. Full details can be found on their website https://theramblersrest.co.uk. Depending on service, this may result in a slightly longer lunch break than normal.