This is a list of missions (both space and ground-based) with UK involvement. A contact person is listed for each one.
Current Operational Missions/Instruments
Hinode EIS (Louise Harra) http://solarb.mssl.ucl.ac.uk/SolarB/
STEREO HI (Richard Harrison, Jackie Davies) http://www.stereo.rl.ac.uk/
SDO AIA (Robert Walsh) http://www.uclan.ac.uk/sdo/
Hi-C (Robert Walsh, Richard Harrison) http://hic.msfc.nasa.gov/,http://www.stfc.ac.uk/RALSpace/Areas%20of%20expertise/The%20Sun/Solar%20Dynamics%20Observatory%20(SDO)/18415.aspx
RHESSI (Eduard Kontar) http://hesperia.gsfc.nasa.gov/rhessi2/
SOHO-CDS (Andrjez Fludra) http://solar.bnsc.rl.ac.uk/
BiSON (Yvonne Elsworth, Bill Chaplin) http://bison.ph.bham.ac.uk/
LOFAR (Mario Bisi) http://www.lofar.org/astronomy/solar-ksp/solar-physics-and-space-weather
ALMA (Eamon Scullion) http://www.almaobservatory.org/
Missions in Build phase
Solar Orbiter orbiter http://sci.esa.int/solar-orbiter/
Solar Orbiter EUI (Louise Harra) http://eui.sidc.be/public/eui-short.php
Solar Orbiter SPICE (Andrjez Fludra)http://www.stfc.ac.uk/RALSpace/Areas+of+expertise/The+Sun/Solar/18462.aspx.
SKA (Eduard Kontar) https://www.skatelescope.org/
DKIST (ATST) (Mihalis Mathioudakis) http://atst.nso.edu/
Future mission possibilities
Solar-C (Louise Harra) http://hinode.nao.ac.jp/SOLAR-C/index_e.html
EST (Sarah Matthews/Mihalis Mathioudakis) http://www.est-east.eu/
SULIS (Solar cUbesats for linked Imagining Spectropolarimetry) Eamon https://sulis.space
HiRISE (Robertus) http://www.mssl.ucl.ac.uk/~lkh/UKsolarmissions/HiRISE-NEOCE_ESA-M4_mssl-web.pdf
SPARK (Sarah Matthews)http://www.mssl.ucl.ac.uk/~drw/spark/Home.html
SolmeX (Dave Williams/Sarah Matthews) http://link.springer.com/article/10.1007/s10686-011-9271-0
INSTANT (Jackie Davies)
Carrington - L5 space weather (Richard Harrison/Lucie Green)
HiC2 (Robert Walsh)
Space weather coronagraph project (ESA SSA, RAL involvement)
Space weather corongraph (ESA ITT)
Space weather diamond concept (MSSL)