England
Worcestershire
Free camping in Pershore
Follow signs to long stay car park. Free overnight parking 6pm to 8pm. Few minutes walk into town by a footpath.
Wiltshire
Free camping near Frome
Heaven's Gate, Longleat Estate. To get there come of the A36 onto the A362 and follow the signs to Longleat. At the roundabout take the first exit signed to Centre Parcs but keep going along there past the wood mills etc. On your left you'll see a fair sized car park to use and Heaven's Gate is a short distance away.
Free camping on the A4
A useful stop on the way to (or from) the West Country is a layby on the A4 just over a quarter of a mile west of the roundabout at Beckhampton between Marlborough and Calne. There's only one entrance and you go up a slight rise to a level area at the top, above and fairly well screened from the main road. There are some good walks from here and it's quite near Silbury Hill.
West Sussex
Free camping in Petworth
Just before entering the village, coming from Midhurst on the A272, there’s a parking on your right that looks suitable for an overnightstay with a motorhome.
Free camping in Horsted Keynes
A good place for staying is the small pull-in car park bay on the approach road to Horsted Keynes Station. Also you can contact the Bluebell Railway for permission to camp on the field overlooking the station. Charge £3 per night (including the key to the station to use their toilet and shower). A must for any steam, or retro enthusiast.
Warwickshire
Free camping in Stratford upon Avon
Park and Ride with an area dedicated to motorhomes with about 20 places. Parking is free. The bus into town centre is £1.30 return per adult. The P&R car park is north of the town centre near the roundabout at the junction of the A3400 and A46 (Stratford northern bypass).
Surrey
Free camping near Martyr’s Green (near Woking)
On the M25 From Leatherhead to Byfleet, exit At junction 10. Do not take the main road (A3) to Guildford, but when on the roundabout take a small road immediately left to Martyr’s Green. After approximately one mile go left on Old Lane. Immediately on your left there are two parkings, one with a loo, which I think are suitable for a motorhome.
Free camping in Malden
A large car park behind the High Street (at the rear of the frozen food shop).
Suffolk
Free camping in Snape
On the A1094 from Friday Street to Aldeburgh, there is a clearing at the crossroad to Tunstall that is an ideal spot to park.
Free camping near Aldeburgh
Park on the sea defences to the south of Aldeburgh in East Anglia, drive past a car park up onto the wall/track. Yachts on one side, sand and sea on the other. A truly spectacular site.
Staffordshire
Free camping in Whitchurch
Take the road to Whitchurch Truck Stop just outside Whitchurch. It says £2 overnight and HGV's only, but this seems not to be a problem.
Free camping on the A518 Stafford to Newport
From Stafford on A518 towards Gnosall and then onwards to Newport, a number of good layby’s would be very good for occasional overnighting.
Free camping north of Lichfield
A515 signposted Ashbourne At junction with road signposted Handsacre there is a layby (rough ground) where Motorhomes have parked up before now and been undisturbed. Often a passable breakfast served by chap with a mobile kitchen. Virtually opposite Seedy Mill Golf Club.
Free camping near Handsacre and Armitage
Take turning left through Handsacre and Armitage. Just after Plum Pudding PH slight hill. Immediately over crest on left pull in to small canal side parking area - suitable for anything that can get off the road quickly - have even seen lorries parked there. Three pubs in vicinity - Plum Pudding (now also quite a good restaurant - but a bit pricey), Spode Cottage (Tom Cobleigh outfit), and Ash Tree - towards Rugeley.
Somerset
Free camping in Exmoor National Park
Exmoor has loads of great parking spots. Particularly around Dunkery Beacon way where there are some superb views to be had.
Shropshire
Free camping Market Drayton
There is a dedicated truck park just off the A53 at the junction with the A529. It is outside the livestock market and just behind a big Tom Cobleigh pub (family friendly, with a playbarn). You sometimes get refrigerator trucks here which can be noisy.
Oxfordshire
Free camping in Abingdon
The Rye Farm Pay & Display car park, on the A415 going south from Abingdon, on the left hand side just across the river bridge. £5 for 24 hours maximum. Public toilets (pay) are just across the road.